Has anybody else heard this....

[thruxton06]

I have a 06' MCS with just under 14K on it.
Every morning lately after start up there is a whistling/ swing sound coming from the area around rear passenger’s side. The noise is very noticeable and goes away after car is warmed up. Now it has started to do this after the car has been sitting for awhile.
I had the car in the dealership to take care of another problem and mentioned it to them and got the standard “could not reproduce the problem" answer. Having a hard time believing that and get this the tech said it might be bad gas???? I have be using premium ever since I got the car about little over month ago.
Are there any sensors in that area? Sorry this is so long; just want some insight before I take the car back to them.
Thanks

[PK5]

In a previous thread someone else mentioned about the whistling noise from under the bonnet like you experiencing. He said it was ahole in a pipe i think near the turbo housing, try that first.

[MINIAC]

Quote: Originally Posted by PK5 (original)

In a previous thread someone else mentioned about the whistling noise from under the bonnet like you experiencing. He said it was a hole in a pipe i think near the turbo housing, try that first.

The thread originator's MCS has a supercharger

Earlier build MCS models had faulty crankcase vent hoses so this part may be worth checking out:

RealOEM - R53 Crankcase Ventilation

[iain cooper]

is it your fuel pump ?

[thruxton06]

Thank you for the responses. Hopefully this will give them a idea where to start to look for the problem.