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  1. 11-29-2015 03:30 PM #1
    LakeTahoeQuattr
    LakeTahoeQuattr is offline
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    P1557 with MAF plugged in. Boosts fine MAF un-plugged

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    Has anyone ever experienced this before? I get boost just fine with maf unplugged. Boost code with MAF plugged in.

    No other codes. Boost leak tested, seems to hold the PSI fine

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  2. 11-29-2015 04:48 PM #2
    zillarob
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    If it boosts just fine with maf unplugged, that aint good. Should be wg psi either way, maf code or boost code.

    Maybe post what p1557 is?

    9x out of 10, a problem with these symptoms is a boost leak.
    Psi test only shows leaks to atmosphere. Check dv's, n249, and checkvalves.
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