Audi A4 avant turbo issue

Greg.fisher

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Sep 4, 2015
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hello I have a Audi A4 07plate 163k on clock full service history from Audi!had car for about a year for 9 months it was brilliant!
Now when I go over 3k rpm the turbo cuts out no warning lights come on once I restart car all is fine again.
Also when car is first started in the morning between first and second gear turbo let's of a grinding noise?
Anyone any ideas what's up with it?
Thanks Greg
 
Faulty n75 valve,vac leak to N75 or dump valve or a boost leak.plug VCDS in and post codes here.