zz's z28

Hey all,

I have an 87 iroc z 350 tpi.
anyone know which service number my ecm is?

Tuned Performance

iTrader: (92)

1227165

Six_Shooter

iTrader: (2)

The best way to know is to actually look at your ECM to know. In some cases there are several service numbers that can be used all for the same application.

zz's z28

thanks guys! but unfortunately the ecm that is currently in the car is a cheap reman.
i dont beleive the number is even denoted on the ECM in this case.

Its bad and my car things its running at 240.55 constantly.

its running rich!

Six_Shooter

iTrader: (2)

What is 240.55?

Post a picture of the ECM, even remans should have a number we can recognize.

zz's z28

sorry, that was kind of a quick un-thought-out reply.

when i hook up WinAldl, it says my coolant temp is 240.55.

ive replaced the CTS already, and traced the wiring back to the plug. Everything has continuity.

Leads me to think its a bad ECM.

anyway, as far as the numbers on the side. I really dont think it had any numbers relating to GM.

It was kind of a part number for the specific knock-off ecm.

i can get that number for you if that helps? but nothing like 1227165 is denoted on it.

Tuned Performance

iTrader: (92)

If you read the letters off the computer chip we can identify off of that but I will bet you money its a 1227165.

Impaqt

iTrader: (1)

Hows your TPS readings?

Check this out.....

https://www.thirdgen.org/forums/diy-...e-reading.html

street89

I have an 89 305 tpi is it the same service number as the one u mentioned

bigal55

iTrader: (1)

This thread is 4 1/2 years old but, yes you have a 1227165 ECM. All MAF cars used the 165 ECM while the SD cars used the 7730. 1990 being the change year so 89 and prior used MAF and the 165 ECM. There are other service numbers for that ECM which were supposed to have some improvements. Those can be found using a search for MAF ECMs. HTH!