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  1. #1
    Junior Member Two Rings
    Join Date
    Apr 24 2005
    AZ Member #
    6220
    Location
    SO Cal

    Misfiring Please Help

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    Wondering if anyone can give me some input. My S4 with RS4 setup is running rough, I changed the 2 front O2 Sensors and it ran much better for a week but now it's idling rough and VAG show fault codes with misfires. I have the RS4 Bosch MAF and have cleaned it but car is still running bad. Any input please.

  2. #2
    Veteran Member Four Rings offroader1006's Avatar
    Join Date
    Oct 17 2004
    AZ Member #
    3830
    My Garage
    77 International Scout II, 73 911 2.8RS, 2010 Cayenne
    Location
    Columbia, SC

    Re: Misfiring Please Help

    whats your fuel trim?

    are the misfires on all cylinders?

    what was done prior to the rough idle? is the rs4 setup newly installed?

  3. #3
    Junior Member Two Rings
    Join Date
    Apr 24 2005
    AZ Member #
    6220
    Location
    SO Cal

    Re: Misfiring Please Help

    Hi Thanks for reply, misfires on #5 and VAG says multiple misfires?? Fuel trim not sure I'm running the AMS chip, nothing done before rough idle the rs4 kit has been installed for some time with no issues. Sometimes after I clean the MAF it will run better for a little while. Maybe my MAF is bad as i friend used brake cleaner one to clean it and it may have taken it out??

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