Thanks for the responses to the interchangeable PCM question. Our next question is how we go about testing the PCM to find out if it's good or not. We do not have the Powertrain Control/Emissions Diagnosis Manual. It is for my '93 ATX. Does anyone know how to do this? Any suggestions? Are we SOL and I need to get a different one? TIA Kris '91+ White '93 Ultra Red ATX