hey guys i was drving today and all of a sudden everytime i would get on the gas there would be this whisltiling/squealing nosie comming from the engine bay. it only dose it whent he car is moving( revs up fine with out squeal in neutral) it sound like a suckinng squealing noise....any clue as to what it could be? if i get on the gas lightly i can spool turbo with out that squeal but i have to be very very gental on the trottle.as ssoon as the trottle gose down fast it starts to make noises.

anyways its a 2002 a4 1.8t......i imediately assuumed it was my DV valve leaking but upon a (very quick inpection) i couldnt find anything loose...but if you guys think its that then ill take a better look tomorrow when i am not so tired.
the sound is very highpitched and smooth, builds up like its widing out.

thanks
chris

 

btw its not the turbos spooling cause i know what that sounds like, and its not eratic is fairly smooth like a kazoo would make just with a more of a squeal, wooooooooooooooo (highpitched tho)