ok i know that this is probably the wrong place to put this post but i need help from anyone that can offer it. so im doing a tpi swap to my 90rs. harness is diff so i order one from summit. well now i need an ecm i didnt know that they were diff, well i knew but i didnt know they were that diff. so now i need an ecm and ive called all the salvage places near by and none have ecms. i called thirdgen rescouces and they dont have any ecms either. so right now im up a creek. ive been with out a car for threee weeks now. if anyone can help me locate an ecm i would be very grateful. by the way i have a harness and ecm out of a 87 tpi
and i have a harness and ecm out of a 90rs. well thanks to anyone that can help me.

 

First I suggest you read this post, as you were "borderline".

https://www.thirdgen.org/techbb2/sho...threadid=98771

First, I recommend going SD and getting the 7730. Don't ask for an ECM for a 90-92 F-body. Ask for an ECM for an early 90 3.1 V6 Cavalier or Sunbird. They are a dime a dozen in the wrecking yard and work PERFECTLY.

The Memcal won't work from a V6, but you can generally buy the AUJP Memcal from any Chevy/Pontiac dealer.

If it's a 350 auto, you want the AUJP1615. If it's for a 305, then get the GM Dealership to "earn it's keep" and lookup the proper Memcal.

Later, you can buy the eprom burning equipment and make all the necessary changes to "fine tune" your eprom. Don't waste your money on an "off-the-shelf" or "custom eprom".