Hi all. I have a 2000 S4 that has got no boost and the car is making a whinning noise when on the power. It is not a whooshing noise so no split pipes. (I've had one of those). For what It's worth I think one, (or both) of the turbos is not spinning. But how do I tell which one? Can you remove the turbos whithout taking the engine out. Looks like I MAY be able to get to them by dropping the sub frame. Any help would be greatly appreciated. thank you in advance. 20vtiny.