My 2000 audi s4 2.7 Twin turbo wont go over 2000 rpm.
The car idles fine and drives ok but when I get to 3000 rpm it sputters and shakes and eventually stalls.
It will start right away and run rough for a second and then idle fine again.
No engine light comes on that I can see.
Anybody have any ideas?

 

Bad turbo's?

 

check fuel pressure/flow. bad turbos would whine at all times IMO.. maybe fuel filter clogged, weak pump, or ICM malfunction. have you vagcom'd the car yet?? this is a must..