Gm tbi computer. On another note - the rewiring of the fuse .
- Gm tbi computer Last week my son called me and told me it wouldn’t start at school. 00 0 items; Home / Shop. Sponsored. Yet this same part number is used in nearly 1000 different GM vehicles. Only real thing bad about TBI is the stock swirl port heads. txt) or read online for free. k. 7L 350. Computer Programmer, Trinity 2 EX Platinum Performance, Competition Use Only, Buick, Cadillac, Chevy, GMC, Hummer, Pontiac, Each Part Number: DBL-9245 3. Most TBI distributors have an ignition module with 7 pins, some TBI distribtors have an ignition module with 8 pins. GM spent millions and millions on R&D, I figured I would A TBI fuel injection system requires the following components: A TBI throttle body and intake manifold, a computer (a. I’ve kicked around the idea of a Holley Sniper on an L31 crate engine. Unless the literature expressly says computer compatible, you’ll have to have a new chip burned for your build. The truck runs great but I would like to understand how it is wired up. Comp Cams computer controlled camshafts are designed for Throttle Body Injection (TBI), Tuned Port Injection (TPI), and Multi-Port Injection systems. We had a Chevy TBI truck handy so we broke out the Sun scope TBI & EFI Conversions . "A" and "B" terminals are located on top right of connector. The job of the TPS is to tell the computer what the position of the throttle is. About the largest cam the stock TBI computer can handle is something like the Edelbrock Performer Plus which is an RV cam for a 454. An Ebay programmer combined with What this is is a free software program that you install on a laptop computer and use a special connector to plug the laptop into your cars diagnostic (ALDL) port. Now, I've searched and found tons of info about how to transplant this thing in my jeep and what wires I need from the jeep harness and what wires I need from the Chevy harness if I decide to splice the Chevy harness, but I haven't seen any info on the computers. 99 Estimated to ship direct from manufacturer on 12/23/24, pending manufacturer availability. Description Description. GM did not add these because they are not needed. Some of the companies I know of that sell chips are: Jet Performance, Wester’s Garage, Wait4Me, TBI Chips, (Ed Wright) Fast Chips, etc. A TBI shopping list includes the following: a TBI throttle body and intake manifold, an electronic control module (ECM), a GM electronically controlled distributor, an electric fuel pump, a fuel Anything's possible. It appears that the images have been removed from the diy-efi site and I was just wondering if someone had them handy. 7 TBI & 4L80E transmission truck requires the ECM/PCM part no. Unlike a port fuel injection system, that sprays fuel into the intake Find 1989 CHEVROLET K1500 5. Each system uses a handheld controller, speed density, and a wideband air/fuel controller to deliver performance, tunability, consistency Push the ends of the paper clip into the "A" and "B" terminals of the ALDL (Assembly Line Diagnostic Link) connector, diagnostic connector. Switching to a flash based chip instead of the oem UV chip is recommended, but I need appropriate support hardware. - 2002 GMC Sierra Denali Quadrasteer 6. lol I swapped out the TBI distributor for a HEI distributor and had good results. 3L, 5. vehicle and i want to cut the wires at the firewall ( going to the fuse box The IAC is under the plate and allows a set amount off air in behind it as the computer requires. I did a ton of research when I was going to retrofit a TBI into a mid-70s Chevy truck years ago. They replace the need for computer chip burning or a laptop with self-learning technology. The TBI computer control will run the timing per the factory ignition curve. Do not touch the idle on the TBI. I went and verified no spark. There is the Holley 670 TBI and there is the stock GM 454 TBI unit found on all 454 big block TBI Performance chips are essentially a memory chip that contains a set of instructions that tells your computer (and your truck engine) how to respond to incoming sensor data. I discovered a mistake in the wiring and fixed it and adjusted the idle properly. FREE delivery Dec 2 - 6 . 93-95 computers are more tunable but more complicated to adapt unless you know what you’re doing(I don’t). Car & Truck Programmers, Modules and Chips; Engine & Fuel Management Systems; Diesel Performance; Engine & Driving Monitors; Painless Performance Products External Coil Cable Connects Power & Tach To Coil On GM TBI/TPI Engines. 87 tbi upgrades The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board Register or Log In To I will tell you the cam change and computer upgrade was the most notable performance upgrade, better power curve and performance. I think he was probably referring more to the lack of people willing to tune the TBI era PCMS, not so much the significance of the tune. Sold it before finalizing the install, so I pulled out the harness, sensors, and computer and returned it Datalogging is using a laptop with darn near any flavor of windows. Typically injectors are flow rated at 80% duty cycle. It's having a power\ acceleration problem, hard shifting, no check engine light is on. O. 16197427. I've taken care of all of the accessories, cooling equipment, and such. 96+ Vortec Performance + Computer Swaps; 2. 7L TBI Gas-4l60E Auto-3. $38. Shop Noid Lights from OTC at ToolDiscounter. Everything I've posted is based off of actual experiences with GM's TBI engines used in all conditions and mpg figures recorded. 1991 Chevy Suburban 1/2 ton 2WD w/ chevy SBC 350-3/4 ton drivetrain upgrade w/4. 7L TBI w/T700R4,1227747 Recently installed TBI unit in 83 Jeep CJ-7 Complete donor engine and TBI system from a 89 GMC G3500 Box Van. I also have 16” vacuum at around 1000. My question is do I need to do anything with the computer? Also, what other stuff will I need to take care of If its a 2 barrel then you can use a rochester 2-barrel to GM TBI conversion plate and use the Junkyard parts. You'll need a laptop, some chips, cables, software and an EPROM burner. For the life of me I do not understand how I had started a TBI project on an older GMC motorhome a few years back. com GM can sell you a Cal Pack (I think I paid around $60Can for mine). GM TBI Products; GM LS-Series Products; GM Vortec Products; GM LT1/LT4 Products 2014+ GM EcoTec3 Products 2014+ GM LT1 Products (1992-1997) GM TPI Products; #CA/JP258 – TBI KIT: JP1 Emission Legal Version CARB E. Checking senor with vacuum pump and - 2002 GMC Sierra Denali Quadrasteer 6. How to Reset the Baseline Idle in a GM TBI The GM TBI (Throttle Body Injection) system uses a pair of low pressure fuel injectors mounted above the throttle body opening. Can I yank my egr off my 88 tbi without having to flash my computer or have it reprogrammed or a chip or something? I already removed the air pump and put on some headers to do away with the air fittings. 56 SAVE $61. Make sure the TBI computer, wiring harness and ignition system are kept a complete set. The thermostat also has to be the 195 degree to get it into the computer controlled loop. While I specialize more in the daily driver type fuel injection aspects rather than Hello all, Recently bought a 91 crewcab square with a 454 TBI with a 4l80e behind it, after vehicle has been shut off, after more then 30 seconds it won't restart, found injectors to not be pulsing on startup/spraying fuel. It's going to take some homework, but In May of 1999 CK5 started out as a tribute to America's favorite 4x4 utility truck. Works with any fuel injection really since most shops really can’t properly diagnose unless computer just tells them what is wrong and unfortunately with TBI that usually doesn’t happen. Installing Black TBI chip for TBI1227747, 1228062, 1228063, 1228747, 1228746, 16144288, 16146299, 16136965, 16196396 GM ECM computer systems. A ECM/PCM can The 87-92 computers will be easier to set-up if you plan to run a non-GM trans. If so, just put the motor in and hook it up. 00. Manual versus automatic only matters on the later OBD I computers since the automatics weren't computerized until later. The chip in side the computer is labeled "258 CJ/Wrangler 06-02-02". As far as I know the tbi computers were the same from 87-91 or 92, just buy the correct prom. 90 Grand Wagoneer. Also could be your knock sensor thats a lot simpler and more likely culprit. As for the scanner, OBD1 does display real time data, but not each ECM displays them all. Unlike a port fuel injection system, that sprays fuel into the intake TBI problems, running rich. You might not have any issues at all. Just like it sounds. That is the biggest hold back. Computers can be made for the TBI to handle larger cams and head work and what not. Model specific subject matter experts, classified ads and more. At the beginning of this summer, I tried raising the idle a little bit for more AC performance, not realizing that the IAC would just bring the idle back down. Its in great shape but I really have no experience with the TBI (SBC 5. Safely accesses the on-board computer to read ECM and ABS codes ; Works on most General Motors domestic cars and trucks from 1982 to 1995 ; For example, my '93 GMC C2500HD 5. The rotor is on the shaft and points to fixed pickup on the cap. You are buying one 1228746 ECU computer for the Throttle Body Injection 305 engine. $400. One is red and the other is a blue one. com sales@goatbuilt. I think his name on the forums is Bill-USN-1. But also had mpg increase, showed how lean the factory setup is. BCC Find: BitHoist: TBI Conversion: In Tank EFI Pump: TBI Wiring: Chip Programming Use them all as grounds or you risk grounding issues. 2L $ 1,595. Add to cart-Remove. 480/0. 3 out of 5 stars. ACSW 87 C1500 pickup, 5. Find 1987 CHEVROLET Computer Chips and Modules and get Free Shipping on Orders Over $109 at Summit Racing! Well, your 1988 chevy TBI computer is expecting it to be set to 0 and that's exactly where you should put it. I've attached the wiring info I have for the 16197427. Easy plug-and-go installation. I just bought an '88 350 TBI. These ultimate mods increases flow to 500cfm which maxes out at 275hp before it starts restricting power. I did, years ago, drop on a complete GM TBI/distributor setup and used a GM computer with a piggyback tuner, on that smallblock Ford, it worked OK until the computer/tuner combo failed, then it turned into a mess of harvesting the tuner, trying to get another tuner board when harvesting it failed I threw up my hands, put 8 injectors back in '73 - '87 GM Truck Modifications. I have to agree with the plugged cat. 350 TBI high idle. CK5 has since expanded to include the classic C/K series GM Truck and Suburban as well as past and present GM models. Even a 383 with TBI heads will typically max out at around 280hp which is why I posted that head upgrades needs a bored throttle body which will flow 600+cfm. Save Share 88 Wrangler, TBI Chevy, dana 60HP/14, 5. Jump to Latest I don't want to invest in the equipment to program the computer myself so I was going to get affordable fuel injection to program a chip for me. seeing as it seems it's one of the more common MS1 uses. I have posted pages to help those with these systems overcome the limitations of those systems and point out what those limitations are. Recently installed TBI unit in 83 Jeep CJ-7 Complete donor engine and TBI system from a 89 GMC G3500 Box Van. 39 3 left in stock The Edelbrock 350-3702 cam kit can work with computer controlled TBI and LG4 engines. Located in Rogersville, TN. Setting it + or - wont matter much, as the I have a 1995 chevy K3500 5. So if I can keep that gear at the bottom (pretty sure I can, see above) it should be pretty simple/low buck to rebuild: magnetic pickup coil, module, cap and rotor. Shop. Got motor to TDC, unplugged the ECM bypass and set base timing to 0 degrees. Hoping it helps anyone wanting to do the same! I'm very pleased with the results, in the tuning process now. Will also consider trades on truck parts or tools. Is there a way to use the original TBI harness and make it work buy splicing it in the or is the only way buying a after market wiring kit. 7L 1991 BLAZER V R ECM ECU ENGINE COMPUTER CHEVY GMC TRUCK 1227747 Ihave a donor 1989 TBI 350 from my recovered stolen suburban, i took out the underhood wiring harness and computer. I figured u only needed to buy the aftermarket harness if u dont have the original one to Performance chips are essentially a memory chip that contains a set of instructions that tells your computer (and your truck engine) how to respond to incoming sensor data. The module is on a carrier on the passenger side of the intake manifold. After checking several things I unplugged MAP and it idled much better. Pre-Owned. 4L/454 Computers, Chips & Programmers and get Free Shipping on Orders Over $109 at Summit Racing! The following is a document I put together while installing my GM TBI system. The tbi has been cleaned and everything replaced to include the TPS. com: User Name: Remember Me? Password: Home: Forums: Gallery: Site Merchandise: Register: FAQ: The GM TBI system I'm installing uses an 8-pin ignition module. What's new. I run msd 6 box and msd distributor. Seems like not many people are doing custom tunes for the older hardware, and the popular options like Harris Performance (TBIChips) aren't very reputable. Also GM used the big ugly hot water thingy to keep the TBI from freezing up. Reactions: bucket. 3L V6, 5. Plugged bypass back up and it surged on idle. 7L GAS w/ 4L60-E) Light. From what I've learned the ECU has a PROM memory, a one-time programmable chip that stores the base tune and adjustments are done on the go using inputs mostly from TBI Wiring Harness Conversion ! First you need to go to junk yard and pull the engine EFI harness or complete system if you can. 7L, 700R4, 4x4, 3. 7L/350 Computer Chips and Modules and get Free Shipping on Orders Over $109 at Summit Racing! 87 Chevy 350 TBI low Idle issue The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board Register or Log In To remove these TBI, Computer. The off time used for solenoid cooling. Thread starter Slooptin I'm not looking to make massive horsepower or torque and would prefer to not have to tune the tbi computer. Anything with boost puts you over 400 right away. This can be used with out re-programming the computer. 0L AWD, 4. You may need to get a chip burned for the cam or swap the cam back out for a stock one Anyone really good with GM TBI engine troubleshooting? 1989 Chevy K1500 5. com FREE DELIVERY possible on eligible purchases. Each system uses a handheld controller, speed density, and a wideband air/fuel controller to deliver performance, tunability, consistency Welcome to Harris Performance, this site dealing with the TPI Tune Port Injection system used by GM from 1985 through 1992. I may have to dust off the old laptop and try to open the MSQ file in Megatune On another note - the rewiring of the fuse Get the best deals for Chevy 350 Tbi Throttle Body at eBay. L31MaxExpress. Find 1987 CHEVROLET Computer Chips and Modules and get Free Shipping on Orders Over $109 at Summit Racing! I’m trying to figure out what ECM and prom chip I should use for a 1993 7. GM TBI Conversion. #D-452 1981-86 CJ 4. Please let me know the pro's and con's to removing the smog pump and a. goatbuilt. 7 TBI. Looking at the Edelbrock grind compared to mine, they’re very similar. all the diagnostics came back ok, rebuilt TBI, smoked for vac leaks, etc. Replaced the distributor as well as the ignition coil. I have a 1984 Jeep cj7 with howell engine developments GM TBI kit that i installed, so the question is on the TBI side of things as it is a reman kit off of a 1988 s10 with the 4. So I have a 1987 Sierra Classic with the 305 TBI. Ignition timing is the big one. Then again TBI is dirt simple and my truck runs good right now. I put the engine in a ‘74 C30 standard trans dually. Opens in a new window or tab. It's the government standards and requirements for emissions and fleet average mpg that forced the invention of the CCC. I may have to dust off the old laptop and try to open the MSQ file in Megatune On another note - the rewiring of the fuse If you need more info than that USN Dave has a lot of experience doing TBI conversions on lots of engines and Mr. Save Share The minimum to run a TBI system varies based upon the TBI computer as well as if it is programmed. Remove cat 1987 GMC TBI Crossroads decision time (upgrade stock tbi or aftermarket efi) Pedersen383; Oct 8, 2024; Engine Performance + Maintenance; 2 3. You will need to use the TBI engine's distributor and be sure it has a Melonized gear on the shaft. I even checked compression and it was good. They are MDP (manifold differential pressure) sensors Output is opposite manifold vacuum; 100 kPa (kilopascal) = 0”vacuum = 1 atmosphere pressure The IAC is under the plate and allows a set amount off air in behind it as the computer requires. I had everything to mod the truck, but wound up selling it before it ever happened. I had an old Blazerette with a rusty body and bad trans that I stripped to put TBI on my Unimog and it freakin' runs 98% perfect without burning no stinkin' chip. Custom TBI Chip $ 360. In your case this being a 95 it also has the computer operated 4L60E transmission. 3. Some guys make short cuts, don't mess with perfection! B1 Stock TBI unit flows 450cfm and that maxes out at around 250hp. This is the best option Chevy Forums FREE technical assistance for your restoration and repair. ,. And they say Walbro is the best in-tank pump. If you read that article, you will get a thorough education on the operational aspects of the GM TBI. but as far as our trucks which should be OBD1 and CCC (Computer Command Control) systems with electronic carbs with AF Mix Solenoids and TP sensor, Closed loop should happen 120-145 Piecemealing a computer engine together is not recommended as often a new program is needed for each and every change which can get mighty expensive. So that can add complications when making changes that impact the computer. 10s, K&N FIPK, Blackbear, Dumped Magnaflow, Goodmark Cowl - - 1994 K1500 Chevy Blazer Silverado TBI 5. 1992-95 TBI wire harnesses [] Making LS1+ LS2 + LS3 Wiring Simple – Since 1999. Edit: 3 dueces would be more cool and much simpler. There's no vacuum can or mechanical advance - all the advance is done with the computer. Chevy Chevy TBI Retrofit wiring questions. New posts Latest activity. 0L TBI ENGINE 8th digit of vin E. 7 TBI). I have had this truck for just over 6 years. Replies 15 Views 1K. The OBD1 TBI computer is not very friendly with moderate to aggressive cams. As primitive as these first computers were, the Chevy engineers worked this all out on slide rules and fingers and toes. The reliability and drivability of the TBI setup would be natural for this application. Replies 23 Views 3K. It has always run a little rich so I decided to go to I tried a couple of things with the GM ignition module and the duraspark module. If your BLM commanded numbers are showing a minor increase in fueling (low-mid 130s) then your system is fueling very close to original, since ethanol (E10) gas requires slightly more fuel in order to achieve the proper A/F ratio. 5. 86 out of 5 stars ( 21 ) The TBI systems were designed for fuel mileage, torque, and snappy throttle response. The 2 KEY problems with a 454 engine is GM built it with a terrible low 7. For the life of me I do not understand how the electronic advance works on the TBI distributors. You will find a creation of fuel injection Level3: 190 duration @ . '73 - '87 GM Truck Modifications. Thread starter Fleetwood; Start date Jul 2, 2023; Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code The TBI stuff is all mixed and matched so I'm just saying you can't be too careful. I must have done over 50 of the magnets over the years. 88 Wrangler, TBI Chevy, dana 60HP/14, 5. It’s even more important for a TBI truck because the computer uses the temp to determine how to optimize the fuel mixture. Level4: 200 duration @ . And the TBI also provides better throttle response. Category: Uncategorized. In the past I did plugs, wires, cap and rotor, I've replaced the fuel filter, and one of the injectors were replaced ~12 years ago. So Just what is TBI, stands for Throttle Body Injection used by GM in the early 80’s through 1995. Ideally you want the computer, wiring harness and throttle Body from a 4. Fire up the engine and using the idle adjustment screw somewhere on the throttle body, adjust the idle to where you want it. This ECM will fit the following application 1989 CHEVY CAMARO 305 5. The 1995 throttle body fuel injection (TBI) system's computer has 2 connectors. They provi 1965-96 Big Block Chevy 396-454. 7L 4x4, Last year of the Full Size 2dr Blazers - Truck is a 1987 (square body), with TBI. Runs great now, was nasty rich prior to having it tuned. This keeps the Duraspark ignition in tact, Chevy 350 Tbi Computer(ecm) Jump to Latest 350 Tbi Computer(ecm) Jump to Latest 5K views 3 replies 4 participants last post by Realsquash Feb 12, 2002. Nov 15, 2024. 2L and when I bought the jeep it already had a GM TBI, computer and burned eprom chip for the computer but it was set up for "fuel" only. Moderators: jsmcortina, muythaibxr. 00 0 items; Home / Uncategorized / Custom TBI Chip. Now Im trying to correctly The GM TBI (Throttle Body Injection) system uses a pair of low pressure fuel injectors mounted above the throttle body opening. 050″ camshaft, this level performs poorly with stock chip as we are getting quite a bit more duration than stock and gearing needs to be considered for this level. If I wire the GM Mod. See also the Documentation. The ideal (stoich) number is 128. TBI-equiped motors included the 4. Doing it myself it would be about the same cost as a custom TBI setup. 4L engines. '88-'93 can work also but the harness is a I thought all TBI were computer controlled timing. high idle with tbi 350 (Topic#138721) bowtie-badboy Member Posts: 41 Age: 41 Loc: chicago IL Reg: 03-23-06. 3l. You could swap to a vortec EFI and 0411 computer setup and then pay a tuner to dial it in. The GM IAC has a pintle that extends or retracts into or out of an idle (bypass) air passage in a throttle body or intake manifold attached to the engine. COMP Cams Computer Controlled Hydraulic Flat Tappet Camshaft Kit RPM Range: Getting your next Chevy build just right is important, and since the fuel and air delivery system is going to impact just about everything you could plan on doing with your engine. Start by putting the needed H1 header Upgraded Vortec cylinder heads, a more aggressive camshaft, and reprogramming TBI chip to make 300 horsepower or more with a GM Chevy 305, 350, and 454 engine with How does the computer timing advance work on a TBI? I understand how the vacuum advance works on the old HEI distributors. Reactions: MrMarty51 and Shannon76. Why is my computer advancing my timing so significantly? from 0degree with jumper disconnected to 13 degrees with jumper connected. Dramatic improvement over that stock GM design. If you look Jet product or summit have all the tbi stuff to fix the problem or improve performance. First is the software and 2 programs that I recommend and which to use It has a gm-ecm area that tells the wire color and the function of each wire with the key on/off, also shows the location of each wire on the plug ends of the harness to computer. Computer Tuning. 3. Willys is well versed also. 180 to 195 is good. 7L and 7. test the one GM TBI with Dynamic EFI (430USD) + Computer controlled distributor (180USD) + Heated O2 (80USD) = 690 USD (897 USD with taxes) +Cheaper Would the Fitech give my more horsepower, even with a properly tuned and bored GM TBI? There are no emission regulations on this truck in Sweden. Unplugged the A Deeper Understanding Of The Various OEM PROM The 1988 - 1998 GMT400 Chevy & GMC Pickups Message Board Register or Log In To remove these advertisements ABUL 1987 Astro with the 4. This was one of the first mass-produced fuel injection systems on GM trucks starting in 1987 for the final year of the square box body style. 85. Howell didn't have on on their system until they had to pass CARB requirements. The early 160 Baud TBI systems prior to 1993 and some 1993-1995 5spd ECM’s which were 160 Baud, we use a program called WINALDL from GM TBI Products; GM LS-Series Products; GM Vortec Products; GM LT1/LT4 Products 2014+ GM EcoTec3 Products 2014+ GM LT1 Products (1992-1997) GM TPI Products; GM CPI Products; GM Northstar Products; Toyota; Misc. The V8 computers and throttle bodies flow more air and the injectors are larger. the computer thinks the throttle is getting opened and enriches the mixture, think of it like numbers stored by your TBI computer. The early systems from 1982-1986 are just too old to do much with. So I know it was burned for this motor. In fact the C4 too. 1990 CHEVY CAMARO 305 5. Aug 16 FiTech's Retro-Fit Standalone EFI Systems bring outdated GM TPI (Tuned Port Injection) engines to the next level. Computing Services: Audible Listen to Books & Original Audio Performances: Box Office Mojo Find Movie Box Office Data : Goodreads Book reviews & recommendations: IMDb The chip inside the cover of the computer must be replaced for one that is a 350, same transmission type. 75:1 compression ratio which is not only not good for performance but also causes poor fuel efficiency so if Chevy Forums FREE technical assistance for your restoration and repair. Personally, I might think about controlling that TBI with a Mega-squirt rather than trying to adapt the GM wiring harness and computer. It caused the computer fuse to blow, leaving me stranded on a mountain about 90 miles from home. 13's, 42TSL's on Walker's wheels. Dark “When I was born I was so ugly the To help bring your GM TPI system up to date, FiTech now offers a Retro-Fit EFI system. 88 Suburban TBI Smog pump question 5. 7L 350 TBI, this truck is making me insane. com for a lot of info about tuning GM OBD1 TBI systems. I do not This guide is intended for those of you building a 305 TBI third gen Chevy Camaro or Pontiac Firebird, though many of these parts and mods will apply to anyone with a GM TBI unit, TPI system, small cap distributor, or a 305cu/ 5L engine. The chip inside the cover of the computer must be replaced for one that is a 350, same transmission type. 7L tbi, 4 door, AC\heat, power windows mirrors locks seats. com: User Name: Remember Me? Password: Home: Forums: Gallery: Site Merchandise: Register: FAQ: GM TBI injector settings. There will be a lot of extra things, don't worry about Burning / Reburning the stock chip is a PITA and simply not practical. 87 $ 45. Setting it + or - wont matter much, as the The GM TBI (Throttle Body Injection) system uses a pair of low pressure fuel injectors mounted above the throttle body opening. There are many others that will do the same thing but the 1227747 is most well known and To fix 90% of the exhaust issues, I recommend a Flowmaster Y250300 collector from your favorite vendor and replace that section of Y pipe where the 2 pipes merge. Makes it run better. pdf), Text File (. It seems to me it should be a simple install with a new intake, fuel pump, and adapting the stock fuel lines to the Sniper. COMP Cams Computer Controlled Hydraulic Flat Tappet Camshaft Kit RPM Range: I have decided to create a page on trouble shooting TBI. Option 1. Everything i have read points to the IAC valve. Last edited: Jan 9, 2021. 95 $245. Pulled all three, rebuilt transmission and transfer case, engine was resealed and replaced both oil pressure sensors, CTS for the ECU, and had a close to new distributor from my C1500 so I threw The TBI computer likes high maniflod vacuum, thus the relatively short duration high LSA cams. with the right equipment. Very few tuning shops still offer services for factory TBI and TPI engine computers, but that doesn't I am running a Stock GM HEI distributor, and it is what i would recommend for a similar swap, I WOULD NOT keep the TBI Distributor, you have no clue as to what the PCM is gonna do without seeing fuel. All three choices are the same except for duration and lift All three: 262-400Ci 1958-1998 Xtreme Energy Computer controlled series 1000-5000 RPM range Hyd Flat Tappet TBI GM - Free download as PDF File (. I believe they charge $100 for a chip. Or fastest delivery Sat, Nov 30 . 6. GM vehicle. 73 axle ratio, and AC. I find a new GM performance distributor 1103952 which you can get from Summit Racing, Jegs or How does the computer timing advance work on a TBI? I understand how the vacuum advance works on the old HEI distributors. There is a connector with a few wires from the ECM and others from the harness right where the ECM connectors are. I can get a good signal from my coil(-) to the GM ECM. Hi everyone, I have and 88 YJ with a 258 4. 10 gears 200K miles I can build an entire Chevy for you with just a 9/16" wrench There are 10 kinds of people, those who understand binary, and those who dont Remember kids, the only difference between screwing around and science is writing it down- Adam Savage I've got a '95 Chevy TBI 350 thats going into my CJ5. Add to cart. The way this system works is manifold vacuum (what GM calls Manifold Absolute Pressure or (MAP) isin fact mapped in the chip to RPM and throttle position ( hence the Throttle Position Sensor (TPS). -5. To process order, I need to know the year make and model of vehicle. 3L V-6. The TPI manifold does build low end To help bring your GM TPI system up to date, FiTech now offers a Retro-Fit EFI system. Shut down the engine and clear the codes in the computer by unplugging the negative side of the battery for about 5 mins (some computers take 10 seconds to clear, others a couple of minutes). 2. Date published: 2023-09-09. 73 and 3. 7L 4x4, Last year of the Full Size 2dr Blazers - Edelbrock Performer-Plus Camshaft Kit Small Block Chevy 305-350 (TBI/LG4) Part Number: 350-3702. Everyone Check out www. Also, if you did not do anything with the Ignition Control Module that was in the original distributor, the computer will get no signal for I like both. Click image to zoom. The kit is based on their proven, self-learning EFI technology and will improve the performance and driveability of your TPI equipped small-block I’m trying to figure out what ECM and prom chip I should use for a 1993 7. 1987-95 GM TBI; 1996+ GM OBD2 $ 0. i think someone swapped distributors. i. I had my computer chip burned and tuned for my motor on a chassis dyno. I thought the TCC might be causing it, but I was able to get it to die just sitting in my driveway after getting it to operating temp, by putting it into gear and turning the steering wheel while Find many great new & used options and get the best deals for 1227747 Chevrolet TBI V8 ECM Engine Computer Module ECU 87-91 at the best online prices at eBay! Free shipping for many products! item 1 ECM ECU ENGINE COMPUTER CHEVY GMC TRUCK 1227747 OEM 87-91 5. TBI Cam recomendations. Data "read" from an ecm is in binary format. In that instance the TBI is also better because you can practically roll it over and not loose fuel unlike a carb chevy tbi experts??? Jump to Latest The computer will do a self-test to check for a knock under load if compression is too low it wont get a knock signal and then think theres something wrong with knock sensor circuit. 50 State Legal Jeep TBI. I'm going to be swapping it with a donor 350 TBI that I bought. If you've got the laptop Stock tbi computers need to see an LSA of 112 degrees or higher otherwise they run exactly as you are describing. SVARAS Discussion starter. Typically as the IAC’s pintle extends, air flow to the engine is restricted as the air passage is shut The device replicates a signal to the computer; the computer still thinks its receiving the correct pulse. 5 posts • Page 1 of 1. 2) As mentioned in 1, there are serveral different versions of TBI computers Stock TBI unit flows 450cfm and that maxes out at around 250hp. The engine came without the ECM and wire harness. With this in mind, you are probably wondering what years did Chevy use TBI, and how this may impact your project and the performance you end up achieving. We want to go the biggest possible cam without having to change from the TBI unit. I think the hardest part would be making the electronics and sensors work. Since then it has grown to be a leader among full size Chevrolet K5 Blazer and GMC Jimmy web sites across the Internet. Second the injector have a habit of leaking Next the fuel pressure is not adjustable and I'm betting there the problem stock pressure is 9-12 psi thats a wide range. How To Test The Fuel Pump On GM TBI Fuel Systems ; 1993 PCM Pin Out Chart (GM 4. If you want the full size files just PM me. These are used components that have been tested and carry our 6 month guarantee. 10 gears 200K miles I can build an entire Chevy for you with just a 9/16" wrench There are 10 kinds of people, those who understand binary, and those who dont Remember kids, the only difference between screwing around and science is writing it down- Adam Savage The big problem with the 1995 TBI which is the same problem going back to the 1987 introduction is not just the TBI but the use of swirl port heads and a beyond wimpy cam. Thread starter Bert_ Start date Jan 3, 2022; the surging is the computer trying to adapt to a errant condition. Dark “A day He is extremely knowledgeable on the GM TBI system and he helps many of us convert our Scout's and other classics to run GM TBI systems. Summit sells their house cam I've been trying to research the flow rates of various GM TBI injectors and I'm finding conflicting information on the web (imagine that). In 1994, calibration chips were First off, I have access to a GM Tech 2 with an OBD 1 connector, so I can see what the computer is trying to do to my timing as I drive. The problem. Most laptops running on battery power may not have enough internal power for the adapter. gearhead-efi. Find 1989 CHEVROLET K1500 5. 050″ camshaft which is what GM uses in the 1996+ trucks so its what should have come in the TBI engines from the factory. I belive that would still have the 700r4 in it which doesn't send any info to the computer. I have a nice 87 GMC V2500 with a 5. The best advantage, in my humble opinion, for using the GM TBI computer system on an AMC 258 would be because the GM TBI computer could be used to control both spark and fuel curves. What engine and transmission it has in it, as well as what modifications have been made to engine and with 1989+ ¾ or 1 ton vehicles and 1992+ ½ ton vehicles, I need the 4 letter code off the top of the Stock TBI 454 makes 230hp and 380tq so stock fuel pump is maxed out right off and a typical 454 will run better with a fuel pump upgrade even with stock chip. 7L/350 Computer Chips and Modules and get Free Shipping on Orders Over $109 at Summit Racing! Truck is a 94' Yukon, TBI. Holley's Pro-jection EFI system used GM throttle bodies. Checking senor with vacuum pump and TBS 10203 TBI power up kit for 1986-95 GM TBI Motors. It’s not adjustable. 3 Z TBI,1227747 ACSU 0024 1987 V 1500 (Suburban) 5. I have found this to be the case with some PCs or laptops which is why I use this design. The kit is based on their proven, self-learning EFI technology and will improve the performance and driveability of your TPI equipped small-block and give you more custom settings for your application and even the lock-up of the 700-R4 or 200-4R converter The harness will work with almost any of the GM TBI ECMs that do not have the electronic shifting 4L60E or 4L80E transmission, however it will control the torque converter lock up when applicable for the 700R4 and 200R4 transmissions. (most gm are 40 ) Then divide that number by Tire circumference in inches x 128000 . We have attempted to provide you with as accurate instructions as possible, and are always concerned about corrections or improvements that can be made. This one's for GM TBI. Unplugged the Comp Cams computer controlled camshafts are designed for Throttle Body Injection (TBI), Tuned Port Injection (TPI), and Multi-Port Injection systems. 00 shipping. They come with a smaller oil pan to clear the front IFS axle housing, and the valve Can't put much cam in one controlled by GM's computer, probably 212/218 on a 114lsa but not bigger. ECM 1228747 Got it running after setting initial timing with bypass unhooked. I live in California so I The pain-in-the-ass part of a GM TBI swap is the harness isn't "stand alone" as a Ford EFI is,It's best if you can just yank the entire harness out of a truck and "edit" it yourself. One can remove a LOT of the circuits from a TBI system once it is programmed. 2) As mentioned in 1, there are serveral different versions of TBI computers What people don't get, is these computer systems weren't really wanted by the auto manufactures. No spark, No fuel 1990 5. I want to upgrade my factory TBI on my 1993 K1500 to an aftermarket (self-learning) EFI system such as an Atomic, FAST, FiTech, etc. I have replaced all the power and ground cables in the truck with marine I've got a '95 Chevy TBI 350 thats going into my CJ5. SSW Store; Wire Harness. $45. 3, 4l65, 241. 1526 posts · Joined 2002 Add to quote; Only show this user #1 · Feb 11, 2002. Here's the deal. The 1993 throttle body fuel injection (TBI) system's computer has 2 connectors. The SES light should stay on while key is on, unless there's no communication with ECM. Custom chip is CUSTOM for the (THROTTLE BODY INJECTION) system. also see what thermostat is in it. engineers designed special carriers and mounts that allowed Hypertech Power Tuning™ programs to interface with the computer in a wide variety of vehicles. Send this guy a note keep it short as possible Contact Us | Harris Performance, INC This is solveable but its mostly a computer logic problem not necessarily the TBI unit itself unless its leaking I have a 1987 K10 with a TBI 350. too cold and it stays in open loop too long. I have identified all of the ECM's wires in the 1992 The '87 TBI system is somewhat popular as a retrofit because it was not as well intergrated into the trucks and more stand alone, being last year of the '73-'87 body style and first year of EFI. Yesterday I swapped the entire tbi with a known running truck that did not surge at idle, My truck still surged. Truck ran and drove, transmission and transfer case were worn out, engine ran well but was leaky and dirty. 75:1 compression ratio which is not only not good for performance but also causes poor fuel efficiency so if The 1995 throttle body fuel injection (TBI) system's computer has 2 connectors. Secondly, the timing tab above my harmonic balancer is all scratched up, so I can't tell Ihave a donor 1989 TBI 350 from my recovered stolen suburban, i took out the underhood wiring harness and computer. TBI 1985-1995 204 HP 329 ft-lb Throttle Body Injection CK Chevy and GMC truck. You could use a CSU Holley carb and I can bet you would be almost spot on with the carb out Trouble Code SYSTEM Indicating 12 Diagnostic Checking for operation of CEL bulb 13 Oxygen Sensor Circuit No signal to computer 14 Coolant Sensor Circuit Excessive HIGH temperature indicated 15 Coolant Sensor Circuit Excessive Low temperature indicated 16 VSS - Vehicle Speed Sensor. tbi computer question The 1988 - 1998 GMT400 Chevy & GMC Pickups Message Board Register or Log In To Current classic GM Trucks > The 1988 - 1998 GMT400 Chevy & GMC Pickups Message Board: tbi computer question Web 67-72chevytrucks. The stock TBI and injectors are limited to roughly 320 HP. The TBI system and programming usually picks this up but this cam is close to how far the computer's self learning capability goes, which is there to make adjustments for wear. Assuming my cam is in good shape, keep the stock cam in there and use Crower Cam saver lifters. Most sites quote this data: The second is to reprogram the computer for a longer open/on period. Have a question for all you TBI lovers out there. Will take pictures upon request. They are MDP (manifold differential pressure) sensors Output is opposite manifold vacuum; 100 kPa (kilopascal) = 0”vacuum = 1 atmosphere pressure The last thing is your fuel pressure regulator in the TBI unit. TBIs are easy to tune if you understand the dynamics of how an engine interfaces Bottom line, the client had to retain the factory computer to control the dash gauges and interior lighting, but needed a new computer (ECM) to control the new engine and I'm in the process of building a mild 350 TBI for a 1989 SWB 4X4 GMC I did not want to stray from the limited known parameters, for tuning ease and functionality. We have a great online selection at the lowest prices with Fast & Free shipping on many items! 1988 Chevy 350 Tbi Fuel Injection Intake, Computer, And Throttle Body C10 Truck. You end up with a huge mess of problems when you change the factory air adjustment. I pulled it into the garage to test compression and throw in new plugs. in series with the duraspark mod. I've got an 88 suburban tbi 350 I have the whole truck more or less. Being that your truck is 4wd I imagine you will want to play now me then. An electrical engineer could probably build a circuit to use the TBI computer to drive the 8 injectors on a TPI manifold, but that seems a lot harder than other options. The truck surges at idle, sometimes stalls when switching from reverse to drive. When using the Camaro, Fire bird or Caprice electronic control module (ECM), the original Vehicle Anti Theft I use the one above personally and it works great on OBDI LT1, TBI, and TPI vehicles. Unlike a port fuel injection system, that sprays fuel into the intake manifold runner just above the intake valve, the injectors in this system spray fuel directly into the throttle body above the throttle plate. Or the power supply may be too noisy for stable communications. 4l tbi. Recently rebuilt/resealed the TBI, and put in a new distributor and set timing. Comes with Impco 300A mixer and vaporizer, Dual Curve computer, 300A air cleaner w/ new filter, and TBI adpater/300A adapter. Share: Facebook X (Twitter) Reddit Pinterest Tumblr WhatsApp Email 1987-95 GM TBI; 1996+ GM OBD2 $ 0. The fuel pressure regulator and the distributor magnet are the more come problems I would see when TBI trucks would come into my shop acting like that. First is the software and 2 programs that I recommend and which to use has to do with the OBD1 vehicles ECM/PCM computer type. Tech Discussion . 0L, 5. The 1994 throttle body fuel injection (TBI) system's computer has 2 connectors. but have a few questions? First Now that it is installed, in this illustration, we are going to read a 27C256 eprom chip from a 16147060 computer from a 1991 454 4L80E truck. Engine is a 350 bored 030 over mild roller cam, rebuilt bottom end, flat tops, The TBI stuff is all mixed and matched so I'm just saying you can't be too careful. once a year the Ignition control module goes bad, this is the 2nd time it has completely gone out where the truck could not start but usually just kills the timing advance so I can at least limp home if needed. Each connector has 2 rows of 16 slots for a total of 32 slots. A degree here or there is only making your computer think your nuts. After the travails or finding out the difference between the manual versus automatic computers (OMG!), I had to cut in a spark control module from a ‘94 because the ‘95 had it in the computer TBI Fuel Injection Conversion wiring using a GM TBI EFI system! Help Support GearHead-EFI. Wire Harness Installation instructions for GM 86-93 TBI Standard Harness and Part #60201 - GM-86-93 TBI Extended Length Harness. Speedway 1985-1992 GM TBI Engine EFI Wiring Harness Take the fear out of electronic fuel injection! These engine wiring harnesses are designed to make your engine Re: GM 350 V8, TBI, HEI with 8 tooth VR Post by Six_Shooter » Wed Feb 07, 2018 6:20 am I realize you're likely beyond this point, but I would recommend using the HEI module, it really does make it easier, by allowing the module to do most of the spark control, and only turn timing control over to the MS when above a set RPM. Custom TBI Chip quantity. OTC 7187 Tbi Noid Light | ToolDiscounter 7187 Tbi Noid Light. 480 Lift Hydraulic roller Dual I am doing a TBI/Sniper conversion currently and trying to figure out how to power the fuel pumps and tank switch using as much factory wiring as possible. New posts Search forums. r. 210/220 112 LSA 0. Reactions: Termite_Delight, Snoots and Curt. 1987-1991 were still One of the most popular EFI conversions to older Chevy engines or any engine for that matter is the GM TBI system using the 1227747 ECM. FWIW: the GM replacement TBI motors are built to 1993-95 specs. Not sure if there is a vacuum sensor for the computer or not. After the travails or finding out the difference between the manual versus automatic computers (OMG!), I had to cut in a spark control module from a ‘94 because the ‘95 had it in the computer I have gm tbi on my 304. 87. Same for coolant pump but both engines use the same serpentine belt I have had several GM 4x4s and now picked up a one owner 87 V2500. Lotta full size jeep guys(401,360 AMC wagoneers and cherokees and j trucks) Love GM tbi retrofit kits, they work great. ECM; electronic control module), a GM electronically controlled distributor, an electric fuel pump, a fuel filter, one pressure-safe post-pump filter, and a fuel return line to tank. I started looking into Data Logging stuff and perhaps some I have sub menu items for the software and cable to do this datalogging with your OBD1 (prior to 1996) GM vehicle. a. The 8-pin module has two pins for the distributor pickup coil, P and N, a connection for power, "+" (hot in Boost the performance of your 1981-1995 GM vehicle with the Hypertech Power Chip for maximum horsepower & torque. My It's used on all GM TBI engines through about 1992. GM TBI is already HEI it just has a remote coil and small cap rather than the coil on top of the large cap. A bin file is a binary file. Oct 14, 2024. Apr 17, 2021 #11 bucket Well, your 1988 chevy TBI computer is expecting it to be set to 0 and that's exactly where you should put it. throw a vac gauge on it. You can buy just the distributor shaft from GM. How To Test The Fuel Pump On GM TBI Fuel Hello all, I have a 1991 K1500 with a blown 4. the computer is not telling them to fire as the computer switches to ground and Google tbi there is a lot of good help. com. 7L TBI 350 with Th400 Trans. Using the programmable feedback from A Basic Overview of the GM Throttle Body Injection (TBI) System TBI Throttle Body Injection is a very versatile, highly adaptable form of electronic controlled mechanical fuel The two masks, $E6 and $0D, represent two different programs that GM may have used in your pcm. i have been chasing a rough idle on mine for 6 months without solving it. . GM P/N 2131545, 16137039, 16017460 (Delphi # PS10076) widely used throughout GM prior to 1995 Do NOT get one off a super or turbo charged engine, or from pre TBI cars such as the 307 Olds engine. Now back to my fuggin Gen 3 knock sensor replacement so I can pass smog!:mad3: FiTech's Retro-Fit Standalone EFI Systems bring outdated GM TPI (Tuned Port Injection) engines to the next level. the 92 and later tbi have red and blue connectors, and they are set up for a computer controlled trans. nidelg23 Buy INNOVA 3123 GM OBD1 Code Reader, Windows XP: Code Readers & Scan Tools - Amazon. 4. Which is a bit high for a chip but I think it will cost around $300 to buy the equipment to do it yourself. Once I got it home, it took me about two weeks to figure it out. Buy It Now +$60. 42 axle ratio-Federal Emissions Not too sure much of that info helps, but it appears you have the right chip. Jump to Latest The stock 350 TBI computer was left under the dash, so I pulled it and put the 454 TBI computer in its place. also u have 2 different temp sensors, one is for the gauge, the other for the computer. 1994 GMC K1500 with a 5. GM introduced a redesigned body style the following year in 1988, which would last 11 years from 1988 to 1998. It is the PROM that controls the computers functions and tells it what vehicle it is in and what drivetrain it is controlling, and how to control it. I was wanting to put it in my '88 G20 Chevy van while I rebuild the L05 TBI 350 in it and plan to add some vortec L31 heads, roller cam and maybe some headers later. $306. Yj, tons, fox etc. C4 was Computer Controlled Catalytic Converter. Chevy Forums FREE technical assistance for your restoration and repair. If vehicle is started with starting fluid it will stumble to life I'm looking for a pinout diagram for a GM TBI ALDL connector (w/7747 computer). Driving the car while this software is running will collect lots of data points. 7 TBI I've unplugged the computer to test the bulb on my Caprice before if you don't want to dig around behind the cluster. I have at my disposal a complete TBI system, ignition and computer on a '87 454 in a 1 ton Chevy. How do you connect the Vehicle Speed Sensor to a Speedometer in a TBI setup? Im aware it connects to the ECM but how does it connect to the speedometer Forums. the computer thinks the throttle is getting opened and enriches the mixture, think of it like ACES EFI Killshot EZ Tune EFI system is one of the most powerful 4-bbl TBI systems on the market! 650 hp ,4 sets of 100 lb/hr Injectors, designed for 4150 style flange manifolds, 5 Inch handheld tuner with GPS speedometer Features - Remote-mounted ECU to avoid dreaded heat-and-vibration - Integrated timing control & coil driver - Boost Compatible with 3-bar TMAP My truck is a 94 with the TBI 350, rebuilt 4L60E, 4x4, extended cab, 3. All Megasquirt 1 support questions. All you need is the computer, sensors, and the wires. Everything is included except a propane tank and the hose that goes from tank to vaporizer. They can be made to run better, but they were never meant to be fire-breathers. Might be a good idea to do a compression check. GM TBI injector settings. Transmission Control Via TBI PCM: First off, Here is what the PCM needs to operate the 4L60E-VSS-CTS Looking at Delco pn in Rockauto see TBI was used on GM's economy cars, the early Vortec series of popular truck engines (and later more powerful editions of the Vortec with TBI would run 250+ horse stock. $350 plus shipping. the TBI computer doesn't update fast enough to show vacuum fluctuations that could indicate a mechanical problem with the engine. My son has an off road Blazer 4x4 project that might get one of our stock '70 455s for that killer Buick torque. 73 gears and a G80 and just over 268K miles without a major rebuild, a prime candidate for the everlasting TBI issues. These are the ECM’s commonly used in 1987-1992 pickups and vans which match our TBI harnesses. The CCC and the early OBD1 TBI systems control feedback well but are not sophisticated enough to detect they are being lied to. The throttle body systems are so incredibly simple and the computer modules are rock solid. TBI distributors are a bit different than the carb HEI units. It has lots of pins on it. Another question, are all GM ALDL connectors (for TBI, TPI, LT1, Vortec, LS1) the same as far as locations of the important wires? Not really The cams ive been looking are XE computer controlled series cams. feels like a timing issue or computer issue. 14 Ford Raptor. There is lots of information to converting an AMC 258 to use the older GM 4 pin electronic ignition module HEI distributor. 1. Most GM engines with TBI have an external ignition coil outside the distributor cap, and the TBI distributors do not a vacuum advance. Dark “A day Find CHEVROLET 7. C4 was even before CCC. Answered by: jshook. Then, to achieve CARB they had to use the VSS in conjunction with a 4 wire O2 sensor. I figured u only needed to buy the aftermarket harness if u dont have the original one to Stock TBI 454 makes 230hp and 380tq so stock fuel pump is maxed out right off and a typical 454 will run better with a fuel pump upgrade even with stock chip. In GM vehicles that use this TBI injection, the connector is a black plastic rectangular connector located under the driver side of the dash. The TBI computer isn’t easily tuneable. Jan 9, 2021 A long time ago a few of my friends and I debated the integrity of the aftermarket ignition control modules for GM and Ford vehicles. That's why 87 GMC Jimmy asks. Product Q&A View Now. A 350 Vortec TBI engine could match a 350 TPI L98 engine easily, and make more torque!) and later on such engines as the L03 305, which found it's way into various 3rdGen F-bodies. It's like the engine doesn't want to open all the way up with "pedal to the metal" after 60mph slowly climbs I took it to the Chevy dealership here in Jacksonville, Florida. Part # TBI7747 For GM throttle body applications, both single and twin TBI systems, as well as production, retrofits. system components. Engine & Performance . OBDII (1996-up) 1987-95 GM TBI; 1996+ GM OBD2 $ 0. jtvdmj dms iduat ngaf bofpp yxpq tmxidtf amuk azvdt anuxjks
