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anti-shudder ?

Discussion in 'A3/S3/Sportback (8P Chassis)' started by vw754, Aug 26, 2009.

  1. vw754
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    vw754 vorsprung Durch Technik

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    [Aug 26, 2009]
    When i switch engine off sometimes its a smooth cut out othertimes the engine shudders....is it the anti-shudder valve ? if so where is it ? pics?
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  3. paddy
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    paddy Audi=No fault code, no idea

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    [Aug 26, 2009]
    As you don't say if its derv or petrol not sure but it sounds like its what we used to call "running on" in which case it could be a small amount of fuel self detonating ( heat or pressure ) after you have switched the engine spark off.
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  4. Khufu
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    Khufu Active Member

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    [Aug 26, 2009]
    sounds like that to me too.
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  5. VRStu
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    VRStu Just Looking VCDS Map User

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    [Aug 26, 2009]
    If it's a TDi then the anti shudder valve is near the EGR. Check the vacuum pipes leading to it.
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  6. vw754
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    vw754 vorsprung Durch Technik

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    [Aug 26, 2009]
    Thanks everyone......il check the pipes and it is a derv.....2.0 tdi
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