I have a 03 chevy cavalier. It randomly will begin misfiring (thus the P0300). Other times it runs fine. I replaced the plugs, boots to the plugs, the fuel filter, and even the ICM. Sometimes it runs like a champ. Then it will begin misfiring, and I can't make it across an intersection! Next morning, it will run like a champ again! I was assuming the P0141 was a result of the misfiring. Could it be sending bad info the the computer, and thus causing the problems?
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Monday, May 30th, 2011 AT 6:30 PM