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Thread: Misfire at idle, can't solve.

  1. 02-22-2019, 03:18 PM #26
    Adker
    Adker is offline Member BMW CCA, PCA
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    The code are for both banks, I would check the fuel pressure as this will cause those codes. Spraying a chemical into the intake will cause the air fuel ratios to change and the O2 was just reporting that change.

    P0170 (Fuel Trim-Bank 1)
    -P0173 (Fuel Trim-Bank 2)
    -P1188 (Fuel Control- Bank 1 Sensor 1)
    -P1189 (Fuel Control- Bank 2 Sensor 1)
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  2. 02-22-2019, 06:23 PM #27
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    z3forlife
    z3forlife is offline Member
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    It’s time to investigate cylinder #3 and see if you have a leak. Randy’s advice comes from experience
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