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  1. #1
    Active Member Two Rings
    Join Date
    Sep 06 2012
    AZ Member #
    100008
    Location
    Sparks, NV

    C5 S6 Surging/stuttering acceleration

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    I have a 02 S6 Avant with a O1E conversion, I just replaced the PVC valve because the old one sounded like I had a duck stuck under my hood. I drove it for about a week while waiting for the new valve, that's when I started to notice the stuttering under acceleration. I replaced the valve and the duck flew away...but the car still stutters under acceleration, I think it only does this in closed loop because when its cold it drives normal, it hasn't thrown the CEL

    Guy

  2. #2
    Established Member Two Rings
    Join Date
    Feb 01 2017
    AZ Member #
    392151
    Location
    NoVA

    Leak in the intake piping around the MAF?
    Mine acted super odd like that when I reinstalled my intake hose and it wasn’t seated correctly
    Nathan
    ____________________________
    '02 S6 Avant
    '99.5 A4 2.8 Quattro Tip - GIAC engine and tip chip, Stage 3 MAF mod, A8 front rotors
    '64 356 SC
    '73 914 6-cyl conversion in progress

  3. #3
    Active Member Two Rings
    Join Date
    Sep 06 2012
    AZ Member #
    100008
    Location
    Sparks, NV

    Thanks, I will check that and I also plan on cleaning the MAF, do you know the ECU looks at the MAF in open loop



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