Engine 86 GT no start/stall

What Noobz347 said. You need to check for codes. This is the reader a lot of us use:


If you do not have one you can go really old school and do it this way:


If you get no codes the ECU most likely has problems and needs to be repaired. At a minimum you should get an 11, then a 10, and then an 11 if there are not codes. So this would be KOEO and the 11 code means is passed, then you have the separator which is the 10, and then for the KOER you would get an 11 for that test passed.

You are working with ECU's that are 40 years old and there are parts in there that just go bad with time. Great place to get them repaired is here:


The website will say A9L A9P but they repair speed density as well.

Check for codes and report back.

Yes. It’s the Key On Engine Off (KOEO) test. Read the thread I linked with regards to pulling codes.