1987 Fiero ECM Codes

[ericinga]

Working with my dad on his 87 2.8L Fiero. He replaced the ECM and PROM chip. Car won't start and is displaying the following codes on the scanner:
42
41
35
32
25
55
53
52
51

I'm assuming that all of the codes are pointing to a problem with the ECM. All of the 50 series codes seem to relate to the ECM functions.

Anyone had experience with this vintage throwing all of these codes at once?

Thanks in advance.

Eric

 

[melsg5]

Can you go back to the beginning. Why did he replace the ECM and prom chip, what was the original issue and any codes?

 

[92 Sunbird LE]

Prom installed correctly? (IT CAN BE INSTALLED IN THE WRONG DIRECTION ) if not ,its ruined.......................go to pennocks fiero forum online there is an old post how to do it correctly..

Doug in P.R.