i have a 1990 camaro rs had a 305 tbi in it i took an 1987 trans am 350 tpi and installed it into the camaro got it to run but it keeps dieing after a few seconds can someone help me im ready to blow it up had to rewire injectors and the 87 had a maf sensor the 90 has a map but cant plug it in cause the car will only run 1 or 2 seconds plug it off it runs longer dont know what was put in it but was told it had jegs and crane stuff and not stock ran good when it was in the trans am

 

what codees dose it give you?

 

You need to give us a lot more information before anyone can really help you. You mentioned re-wiring the injectors. I really hope you changed more than just the wiring on the harness for the injectors. You need to be using the ECM and harness from the TPI donor car. You can't use the TBI ECM and expect it to run correctly.

 

the ecm is the one out of the camaro codes depend on what we hook up or un hook had the vacumm lines hooked up all wrong and no code but still didnt run the first night it ran ran for over 2 hours fine no rich burning no codes went to drive it the next day and started running like crap the ecm is 1228746 if i need to change this what one can i use the one from the doner car wont wrok cranks but no start it is a 78 79 350 chevy block but thats all i can tell you about the engine use to be a maf but want it to use the map

 

What is that computer number for, what type of system? I would find out a computer # for what you want to do for your appilcation and get the properwireing for it. If we just leave out certian sensors that we do not want to use things will not work right, unless you have some kind of plugin that corrects the computer. I know this is basic and I am not trying to make light of your situation,

computer #'s for 1987 tpi motoer

77-7165 cardone (brand nameAND BRAND NEW). Auto zone $80.00 507 332 0004

754601- 305 everdrive salvage rebuild

754564 - 350 everdrive salvage rebuild

I put the 77-7165 computer in mine and it works fine, but I have the air sensor you don't want.

Maybe Trickster can help you out He helped me with my project and did a dam fine job at it.

GB

rick

 

You definitly should be using the 7165 ECM . But if you wanna convert it to speed density you need the 7730 ECM. The 8476 ECM is for LO3 and LO5 TBI v-8, Not gonna work with a 350 TPI.

 

Make sure you are not using a TBI ecm for a TPI. You might be able to harm the injectors. There is either more or less current goin to them. I don't remember. Check out the tech article about the TBI to TPI swap. Are you using the MAF or the MAP? Did you change the fuel pump? Are you at good fuel pressure? Around 43?

 

i just got a fuel pump today for a tpi havent changed and ecm yet no sensors are missing just dont want to use the maf sensor im trying to use the map sensor but cant plug it into vacumm if i do it only runs a couple seconds unhook the vacumm and it runs longer got the vacumm line finally put where they go but ran better all messed upim changing the fuel pump in the next couple days then going to see if i change to a different ecm will i need to reprogram it or will i be able to plug it right in
thanks for all the feed back im new to fuel injection but not new to mechanics

 

each computer will need a computer chip that is appropate for the application.

later and
GB

rk

 

Before you even decide what sensors are even required you need to choose one of the TPI ECMs and choose a PROM (the actual chip that plugs into the ECM). Only then can you even start to consider whether or not a sensor is required or connected correctly. Your current MAP problem is irrelevant because once you change to a correct ECM, and yes you have to change ECMs, everything changes. If you want to run a MAP instead of a MAF you need the 7730 ECM. You will also have to modify your harness or get a harness from a 90-92 f-body for this setup. You absolutely must change your fuel pump since your old TBI setup used a far lower pressure pump.

I certainly don't want to seem like I'm being rude, but basically your current setup is a complete cluster expletive. You can fix it, but you've got to give up on trying to make what you've got work and basically start setting up your TPI electronics from scratch.

 

Oh my. Start over, this time do a little reading first. You really did that *** backwards. There should be a slew of info on this site to help you do what you're attempting.

 

You have to get that TPI pump in there if you want it to run correct.

 

i got the tpi fuel pump and the 7730 ecm now i just need to find the wiring harness and yes i wish i would have done a lot of reading not like the old days when if it fit it would work now without changing a bunch of stuff if anyone knows anybody that might have the wiring harness that would be great thanks for all the help everyone i also have the 7165 ecm but dont think it will work since i have a security chip on my key and the car the 7165 came out of doesnt have that am i wrong ? (probably been wrong about it from the start) thanks again for all your help

 

Here, check this thread..no need to buy a new harness.

https://www.thirdgen.org/techbb2/sho...&highlight=746

 

Repin it, if it's in good condition. If you can find Kat, he's done a slew of 'em.

 

If i remember right, the ECM has nothing to do with the VATS key working or not working. If i rememeber correctly there is a seperate module tucked way up in front of the dash in the middle that will decide which value key will start the vehicle.

 

May or may not be related, but the PROM does has vats or not in it.

 

Very true 8mike9....A 87 trans am wouldn't of had vats and his does. If i was him i would worry about getting the car to function right with the MAF first and then worry about switching over to speed density later. Like cdartz said " basically your current setup is a complete cluster expletive." I think he'd be alright with a 7165 ECM but he's gonna need prom work.

 

There is a seperate VATS module that actually checks the resistor in the chip to see if it's correct. There are 12 different resistor chips that are possible, and each VATS equipped car would have a module that checks for a specific one. This is not to be confused with whether or not VATS is enabled, which is handled by the PROM in the ECM. If your car has VATS, and you use the 165 ECM with a PROM from 1988 or older you in effect render the VATS useless. A 1989 PROM will have the VATS enabled and can only be used in a car that is equipped with the VATS module. All 7730 ECMs use a VATS enabled PROM. It is possible to burn any year code and create your own custom PROM. I'm running a 1989 bin file PROM with the VATS disabled in my 1987 non-VATS Camaro.

 

There are really 15 different resistors for VATS, well actually only 14. In 1986 GM first used the VATS on the Corvette, but they only made 1 value of a resistor pellet. The #1 pellet which turned out later to be a problem. They never used the #1 resistor again.

 

i changed the fuel pump got the car running with the 8746 ecm runs strong but still misses out going to get plugs and wires the idles not right but some one said cut two wires of the esc and pitch the esc is that right just curious i have the 7730 ecm but just thought id try some more things if it would run half way decent winters coming and its going to the garage for winter work again thanks for all your help