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Geo Just changed the AMM on my '91,I had followed the "normal" parts change routine,O2 sensor, engine temp to ECU sensor,RPM sensor and the FPR. Some of these items helped the engine run better,Temp sensor got rid of the "pinging",RPM sensor made it run smoother but in the end it was the AMM. If I had believed the "codes" I was getting, "compensating for rich or lean mixture at idle" and "conpensating for rich or lean mixture at cruise" I would have changed the AMM after the O2 sensor. FCP Groton will fix you up with one for $205 plus $6.00 shipping, I ordered mine on Monday and got it Wednesday, I'm in Indy so should be about the same for you in Ohio. Hope this helps. Dennis
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