Looking for info on GM ECMs

[Oliver Scholz]

Hello group,

I am new to this list, and I hope to gain useful information
from it and maybe provide some as well.

I am looking for information on GM ECUs used in the
Pontiac Fiero. As far as I know there are 3 different ECUs used:

* one for the 1985-1988 V6
* one for the 1984-1986 L4
* one for the 1987/1988 L4 with DIS

Does anyone have information on the datastream generated by these?
I would be particularly interested in the 1987/88 datastream?

I am also curious as to the content of the PROM. Does anyone know
what is in those and at what locations?

Thank you.

Best regards,

-Oliver