I hear a subtle rattle/flutter sound when lifting throttle at all rpms. I think that I noticed a flutter power delivery under full throttle acceleration. My Avant has a little over 80k. Last year, when doing the head and replacing TB, Futrell noticed a loosening but still serviceable waste gate on my turbo. I also had them put in an APR chip -- nice. Could these symptoms be the end of my waste gate -- are there other possibilities?
jws