Question about 1991 Chevrolet Caprice

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New engine I have just put a a 350 in my 1991 chevy caprice, replacing my old 305 but I am have a problem. With the temp sensor connected the car idles down and then it catches it self and when I put in gear it stalls out put cranks right back up. It will run like a dream on the highway when a have the temp sensor disconnect but the check engine light will say on. I know that with the temp sensor pluged it is retarding the PCM. I guess my question is how can I reset the PCM to read this new engine and will that help with my problems?

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The problem is the temp sensor itself. <try using the old unit that must be fix to the old motor. Or buy a new one BUT solicityng it to your old motor model. There are several sensors with identical fisic aspect and different electrical tolerance. That difference is the cause of your fail

Posted on Sep 24, 2009

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Posted on Jan 02, 2017

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