My 06 A-4 just started this whining noise after it warms up. when you turn the car off it sounds like air being let out of a balloon with the top squeezed. Any ideas?

 

Milage? Any signs of a boost leak? (Have a gauge?) Have a loss of power at all? Belt whine or leak if your power feels off.

 

ummmm whisle is move of a pcv prob......... leaking anything?.... oil round the valve cover?...... as far as noise when u turn it off... mind makes a weird (sounds like a plan landing.. if i have the ac.. on full blast and then shut it off....... so now... i turn everything in the car off.... a min or 2 b4 i act shut the car off............ dk if that helps