90 EPROM problem

[wvturbo2]

I have a 90 and i put a 90 eprom in the car and now the rpms when driving bounce and it jerks the car around while driving. What could be the problem? Is it not a 90 eprom or is there something special you have to do?

 

[timloomis]

If its not a 90,it will act goofy like that since it uses a different coil pack and ignition pack.Just check the part number.Any easy way to tell is that a 90 ecu will have the numbers stamped on in black marker.91+ will have it on a big white label on the front of the case.

 

[wvturbo2]

It is def a 90 any idea what could cause the car to act like this ?

 

[JayRolla]

I was wondering if this eprom has been rebuilt? It might just be a bad ecu. My friend got a 90 eprom out of a junk yard and I tested it in my brothers 90 and it did the same thing you described.

 

[wvturbo2]

It has been socketed and chipped and yes the ecu should be fine ran in another guys car before no problems. Do you think the ecu is the problem or not ? The ecu was changed along with fuel pump and injectors and timing belt.

Nvm, My dsm god has fixed the problem. Thanks for the help though.

 

[steve]

Nvm, My dsm god has fixed the problem.

And the fix was? Help others out who might be searching even if it was user error causing the problem.

Steve