Need help with ECU and PROM
 

So I have been using planetisuzu.com trying to figure out the issue with my sons recently purchased amigo that starts , runs rich but wont idle .

Here is the thread with all the info .
http://forum.planetisuzoo.com/viewtopic.php?f=1&t=77696

My tech was leaning n a bad ECU so we got a good used one and installed it .
No change ... then this.

"Upon further inspection , we found the ECU that I took out of the truck to replace with the new /used one had junkyard writting on it so someone has gone down this route before.
Im unsure though if they replaced the PROM with the original one as thats a MUST!
Does anyone know of a way to verify what # PROM my vehicle is suppose to have?
This is a VERY big piece of the puzzle as if this is not the original PROM for the car then Im SOL!"

Any help would be greatly appreciated .