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  1. #1
    S4_dan's Avatar
    Fire up the Quattro!

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    New fault but no DTC's this time

    Car has decided to play up yet again, only this time, no DTC's present.

    usually happens in 3rd or 5th gear but has happened in others....

    Driving along, revs around 1500rpm and car stutters and hesitates. I'm not accelerating, just holding the speed and can feel the car. Plant my foot down, juddering worsens for about 30secs before car returns to normal and starts to accelerate.

    Or, driving along, drop to third to overtake, plant foot, 30secs of juddering, no power, no aceleration.....then kaboom....off like a rocket!

    Plugs and leads appear to be in good condition.

    Any pointers please?

    Cheers,

    Dan
    2002 2.5 V6 Quattro
    Mods Done: Q5 Rear aero wiper. Front ambient light install. Led number plate lens. Towbar with 13pin electrics.
    Mods to complete: Sport shocks to go with Eibach pro springs. Fit 17" 5 star matt black wheels. Fix lack of torque at low revs. Get a custom exhaust system fitted.

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  3. #2
    "Stick a V8 in it!"

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    MAF perhaps?

    Try unplugging it and see if the problem goes away?

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
    2000 A4 1.8T Sport Quattro Saloon, Black-ish
    1997 S4 - PPC £999 Challenge Track Car Build
    TD5 Land Rover Defender build


  4. #3
    S4_dan's Avatar
    Fire up the Quattro!

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    Ok, will try that Aragorn, thanks.
    2002 2.5 V6 Quattro
    Mods Done: Q5 Rear aero wiper. Front ambient light install. Led number plate lens. Towbar with 13pin electrics.
    Mods to complete: Sport shocks to go with Eibach pro springs. Fit 17" 5 star matt black wheels. Fix lack of torque at low revs. Get a custom exhaust system fitted.

  5. #4
    S4_dan's Avatar
    Fire up the Quattro!

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    Tried it and car ran 80% better. Plugged back in and it went crap again after a few miles so unplugged for rest of journey home. Got home and noticed smoke coming from exhaust and smelt very very rich.

    So a new MAF i thinks!

    They're not cheap....anyone know if i can change just the sensor unit (like i could on my 2.5 V6 Tdi A6) Or is it the full housing unit only on these A4's?
    2002 2.5 V6 Quattro
    Mods Done: Q5 Rear aero wiper. Front ambient light install. Led number plate lens. Towbar with 13pin electrics.
    Mods to complete: Sport shocks to go with Eibach pro springs. Fit 17" 5 star matt black wheels. Fix lack of torque at low revs. Get a custom exhaust system fitted.

  6. #5
    Oranoco's Avatar
    6th Gear

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    From my experience with MAFS get a genuine Bosch one not a Pierburg or pattern one as they are utter ****!!!

    Life begins at 140mph
    Sell my Audi??? Kiss my rings!
    www.passionford.com

  7. #6
    S4_dan's Avatar
    Fire up the Quattro!

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    Yeah, I have in the past with previous Audis. Even had a genuine Bosch part fail within 3 months! Went straight back to VW stealer and got it replaced.

    Took the car out again tonight, still with maf unplugged, and it was hesitating like it did before with maf plugged in!?!?!

    So could be something else as well as the maf having failed? Mpg is averaging around 28 at the moment. Was upto 34 two weeks ago when i fitted two new lambdas!!
    2002 2.5 V6 Quattro
    Mods Done: Q5 Rear aero wiper. Front ambient light install. Led number plate lens. Towbar with 13pin electrics.
    Mods to complete: Sport shocks to go with Eibach pro springs. Fit 17" 5 star matt black wheels. Fix lack of torque at low revs. Get a custom exhaust system fitted.

 

 

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