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Thread: NEED HELP! Codes:P0171, P0174, P0304, Symptoms inside

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  1. 01/17/2009, 11:00 AM #24
    taylorRichie
    taylorRichie is offline Super VXer
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    I replaced the IAC with a brand new one.

    Well I may just bring the car in for a diagnostic

    All Original Codes Came back:
    P0171
    P0174
    P0304

    Doesn't make sense to me...

    I swapped the coilpack with a different one, to see if the code would follow... It didn't, and all my coils (all six) check out with a Multimeter...



    Could a vacuum leak, logically, cause a misfire, and not only a misfire but one on a specific cylinder?
    Last edited by taylorRichie : 01/17/2009 at 11:06 AM
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