Question about 2000 Pontiac Firebird

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Multipule misfires engine runs fine then it misfires than its fine. Than later it does it again dont know what to try replaced all spark plugs and wirs still does it

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I had the same problem, obd2 said cyclnders 1 and 3 were misfiring. After changing the spark plugs replace your coils. they are about 20-40 apiece. If you arent able to do it yourself or have a friend do it expect to pay 150-300 dollars depending on the mechanic and the amount of coils.

Posted on Feb 05, 2009

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