I'm having a problem with my 2003 V6 tdi 180Q in that there is a very annoying and gradually more regular vibration sort of noise around 2000rpm. Driving steady it is pretty quiet but when under load or setting off with vigour it is very noisy at around 2000rpm. I thought it might be the turbo but I called in on an Audi guy yesterday in Leeds and when you rev the car it is apparent and you get a whooshing noise when you let off the throttle which they said was air pushing back into the system or something like that. They immediately said it will be the cams and very unlikely the turbo but would have to remove the rocker cover to check for sure!
I have a BAU engine code so are they also prone to the chocolate cam problem as most of the posts here seem to mention the AKE code.
The car has 98,000 miles and had belts done at 80,500 but not sure if water pump was changed as I did not own the car then. Main dealer did it.
I know it is hard to comment on without hearing the noise but it is beginning to worry me and I do not know who to trust with a very expensive diagnosis. Thanks!