I have a C5 2.8l 30v AVANT. Help me BROTHERS!!!!!!!

[Arsenal2012]

I had a whistle on my car when I accelerated, I recently changed all valve cover and cam seals, timing b, water p, thermo, tensioners, serpentine etc...



I FINISHED EVERYTHING AND ITS STILL DOING IT!!!!!!!

Why do you hate me Audi, why?

Its like a freaking truck turbo whining and I don't get it, what can it be, here is a sound clip.
I noticed it whined like it normally does (only on acceleration) but when the car shifted on its own it stopped then started again when it went to the next gear(5-7 second mark).

https://soundcloud.com/arsenal2012/voice-004


I heard maybe a vacuum hose?
Could it be the trans?

Could it be the fuel injectors, I read it may be that????


I read maybe air around the throttle body or even a crack/leak somewhere in the exhaust...







Also where does this plug go?

[Jewing]

Check everything for leaks, not at all familiar with these engines, pcv valve?


Sent from my iPhone using Tapatalk

[Arsenal2012]

Check everything for leaks, not at all familiar with these engines, pcv valve?


Sent from my iPhone using Tapatalk

Well the noise stopped for now with no action from me

Still hoping someone can shed light on it. Also maybe someone knows where that plug goes to I inquired about?