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Thread: How to Check Anti Shudder Valve?

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    Chrismawa's Avatar
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    How to Check Anti Shudder Valve?

    I'm not sure if my ASV is functioning correctly, as when i switch the car off I'm getting like a shudder/judder. Is there anyway I can check to see if its working ok?

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    hi which engine do you have in your car

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    Quote Originally Posted by yendall24 View Post
    hi which engine do you have in your car
    Sorry I should have put that, its a 1.9 TDI (AWX).

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    ok the anti shudder valve is a black plastic pod with a black plastic plunger coming out of it its attached to the egr valve what you need to do is get someone to switch the engine off whilst you look at the plunger if the plunger shoots out it is working . if it does not shoot out when the engine is turned off that is because the rubber diaphragm within the plastic pod as split this split is usually caused by engine oil vapour from the egr getting into it and and perishing the rubber . the bad news is audi do not sell this part on its own you have to buy the whole egr valve that said i got mine off ebay for 40 quid hope that helps
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    Quote Originally Posted by yendall24 View Post
    ok the anti shudder valve is a black plastic pod with a black plastic plunger coming out of it its attached to the egr valve what you need to do is get someone to switch the engine off whilst you look at the plunger if the plunger shoots out it is working . if it does not shoot out when the engine is turned off that is because the rubber diaphragm within the plastic pod as split this split is usually caused by engine oil vapour from the egr getting into it and and perishing the rubber . the bad news is audi do not sell this part on its own you have to buy the whole egr valve that said i got mine off ebay for 40 quid hope that helps
    That's great thanks! I will check it at the weekend.

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    Forum member @udi A3 checked mine in vag-com... to which my car choked and died so think mines pretty clogged haha.

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    Also check that the vac pipes aren't perished or disconnected and maybe check the wiring to the actuator. Mine wasn't working and it turned out to be a broken wire.

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    could someone put a pic of the shudder valve and where it is please? mine shudders when turned off but i've never heard of this...

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    I know this is a different engine layout but its the black plastic pod attached to the EGR valve


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    Jimmy TDI's Avatar
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    The EGR could be that clogged that the valve can't shut fully, which would stop it working correctly, and totally eradicating engine shake.
    You could just pop the pipe off to look inside to see if this is the case.
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