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idle air control
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  1. MKV GTI
    CEL came on today and it threw a P0507 for IAC reading more air per revolutions then it should. Also 2 codes both for catalyst system below threshold (I assume from the IAC code). I get odd but on-point boost surges (at about 1900rpm boost pulls hard then at about 2300 it falls on its face, then...
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