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Grinding Rubbing Noise when foot offf accelerator

Discussion in 'Audi S4/A4/A4 Cab (B7 Chassis)' started by Wrath, May 2, 2012.

  1. Wrath
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    Wrath Well-Known Member

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    I've noticed this over the past few months but when doing between 20-30, if I take my foot of the accelerator quickly there is a rubbing/grinding noise that lasts for about a second. There isn't any problem with performance and doesn't come on when accelerating. The more sudden you remove your foot, the worse it is.


    Any ideas?
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  2. D8UGF
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    D8UGF Member

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    Stab in the dark here Wrath as a noise could be anything I supose, at one of my many visits to Audi the technician told me that the noise I was hearing is the turbo spooling in the opposite direction to its normal direction between gearchanges, it is part of the design apparently. That is for a 2.0tdi 170 tho, not sure what engine your cars got mate.

    Dougie
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  3. Wrath
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    Wrath Well-Known Member

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    Cheers Dougie. I've had a look on the internet and there's a few posts about it being the wastegate and a couple of other posts to say Audi techs advise leaving it alone and it isn't a problem. It just sounds awful and wasn't sure if it was a sign of something going wrong. My engines a 140 but can't imagine too much difference with the 170.

    Nathan
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  4. seroquel
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    seroquel New Member

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    Hi Wrath

    I have a 2.0tdi 170 which does exactly the same. The noise sounds like brake pads grinding on the discs. When I took it back to Audi the mechanic told me that all a4 diesels make this noise. I think i'm being fobbed off, but can't find anyone who will offer a diagnosis.
    Just wondering if you have had anyone tell you what the symtoms might point to?
    Let me know if you do.
    Thanks
    S
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  5. Stevie170
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    Stevie170 Member

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    Old post but I'm hearin the same noise and wondering if its a problem or just supposed to be there? Did any if you get good answers as to what te noise is or wether its normal or not ? Just had June at a German specialist garage and they said they cudnt hear anything wrong and no codes but te noise I hear sounds rough! And sometimes flutters in low gears

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  6. Wrath
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    Wrath Well-Known Member

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    Still running and the noise still there. No lights on dash and everything else seems fine.
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