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Missfire in park on 2004 Grand Prix GTP comp g

marineinmichigan

marineinmichigan

New member
Im having difficulties troubleshooting this. Also losing about a quart or more oil every 3000 with the exhaust looking clean. Im thinking possibly a bad gasket on the intake. Its the original plastic gasket. I have a check engine light come on and off here and there saying emissions. But emissions have been tested. It seems to be one cylinder only in park. Under load its perfect. Anyone have anything like this?

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