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Engine revs up and down when coasting?

Discussion in 'A6/S6/Allroad forum (C5 Chassis)' started by crispin, Dec 20, 2010.

  1. crispin
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    crispin Member

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    [Dec 20, 2010]
    Anyone had this: 2005 3.0TDI Tiptronic, when driving at say 30 mph and then I lift my foot of the gas the revs drop as you would expect and then they rise a bit and then drop and so on??? Doesn't seem to affect anything else and the car drives great, but this is just a little weird.
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  3. A6UYC
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    A6UYC milf

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    [Jan 4, 2011]
    This might be the pdf filter cleaning it's self!!
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  4. crispin
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    crispin Member

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    [Jan 31, 2011]
    Does anyone else have this on their car?? If you are driving and you take your foot of the accelerator do the revs just drop smoothly or is there a pulsating effect with them going up and down?
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  5. Xtattsbox
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    Xtattsbox New Member

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    [Mar 3, 2011]
    I do. '57 A6 Allroad 3.0tdi. When coasting the car lurches a bit as the revs bounce. Almost as if it doesn't want to change down. Currently at the dealers getting fixed, I hope!! They've had it for 4 days!
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  6. crispin
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    [Mar 4, 2011]
    Hey Xtattsbox, I've replied to your PM, keep me up to date if thats ok. Cris
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  7. crispin
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    crispin Member

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    [Mar 9, 2011]
    Xtattsbox, have you car back yet...how is it?? Has it cured it?
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