So I am currently swapping an 88T2 motor into a 90NA. All of the wiring and hardware is now in place with ALL the wiring fromthe 88 donor car. Is it true that my 87T2 ecu with the markings N332(I think) will not work on this motor(being an 88)? The ecu now won work in my car either. Also is the wrong ecu(if it is) the cause of my lak of spark and no fuel pump power? Please help!!!

 

anybody?

 

I don't understand your question.

Did you use the 88 engine harness, and modify it to work with the front harness of the 90 car, or did you use the 90 engine harness and 90 front harness???

If you used a 88 engine harness, it would take quite a few modifications to use in a 90.

You need to use the ECU that corresponds with the engine harness. For example if you used a 88 engine harness, you would use a N333 ECU (I suppose you could use a N332 as well, but it wouldn't be exactly right).

And is you used a 90 engine harness, you would need to use the N37X ECU.

 

Also, make sure that you use the resistor pack if you are using the early low-impedance (tan) fuel injectors.

 

That's interesting IF I read it right. You put the good working 87 cars ECU into the *project* car. The project car did not start. Then you put the once good working 87 ECU back into your 87 car and now that car won't start. Not good news.

If that's the case, and you are wondering about the once good, working 87 car not starting, try this......on that car, turn the key to ON. Pull the boost sensors elec plug off. See if there is approx 4-5 volts on the brown/white wire. If it's not there, and all the fuses are good, I'd say the ECU has had it.

Just about the best thing to do with the project car, is to print out the output/input of the ECU connectors from the manual (available online) and get a meter out and check each pin on the ECU plugs for the proper results.

 

all the wiring(front main and rear) harnesses are from the donor 88. I know the ecu was killed because I already had a dead ecu(no spark) in my 87T2, plugged in the new one and it fired right up, then put the same(new) ecu into the 88, it didnt create fuel or spark, then once I realized it wasnt an appropriate ecu I put it back in my 87( where it came from) and it was not creating spark again, so i assume the ecu was destroyed as a result of trying it in the 88.
I now have a 333 ecu from an 88 in the mail, I know that ecu(87ecu) caused me to not get fuel in the 88, but can it be blamed for a lack of spark, and no fuel pump or is that a seperate issue?
Thanks for the help guys

 

It sounds like something else is dead and smoking the ECUs or something is wired incorrectly.

The N332 should run a 88 just fine, there are only minor map differences and fuel injector transistors between that and the N333.

 

anybody else?

 

What could kill an ecu? All the wiring looks to be correct.
I dont know what to change and I cant afford to kill/buy another ecu!!

 

ttt

 

Short to ground can easily kill the ECU...


-Ted

 

Ted can you elaborate further? And is it infact true that it just being the wrong ecu would kill it or would it require the wiring to be wrong?

 

start looking for shorts in the harness/ continuity between pins

mike