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  1. #1
    Master Mechanic BurbanMan's Avatar
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    Jul 2013
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    Dolores, CO
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    788

    Default 99 5.7 high rpm misfire

    It happened on our way home from Oklahoma yesterday while pulling an empty flatbed trailer. At high rpm around 60mph in passing gear the cel would come on and sometimes flash. Had the code pulled tonight (p0300) random/multiple cylinder misfire. Strange. I just replaced the intake gaskets, plugs, cap/rotor. It only does this at higher rpm's. I also have a rear speed sensor code that was pulled.

    For clarification, the service engine soon light DOES NOT stay on. It's currently off.
    Chuckie!!!


  2. #2
    Master Mechanic BurbanMan's Avatar
    Join Date
    Jul 2013
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    Dolores, CO
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    788

    Default

    Nobody else has run in to this?
    Chuckie!!!


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