[s-cars] Urgent.. UrS4 vibrates when turbo should kick in...

[Keith Maddock]

Ivan Demkovitch <idemkovitch at hotmail.com> wrote:
> Folks,
> 
> Today I noticed that when on WOT car would start jerk at about 3-4k. Right
> when it should have boost. And it did it on all gears - can't let me
> accelerate fast. It would drive fine otherwise. Hour later I was driving and
> everyting was fine. It was fine earlier today..
> 
> What is that could be?
> 
> Is it something dangerous? I'm planning on driving 500 miles tomorrow and
> wonder what that could be...

Sounds like a boost leak!  Check your boost hoses and the moisture
trap on the firewall.

Cheers,
Keith

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