Noise from throttle body part II/the incredible singing S60

[burnt out]

Thank you for your replies, but I have checked for vacuum leaks and there are none to be found. I gave up and have taken the car to a dealer and they are scratching their heads as much as me. I did have a bad throttle body and that was causing some emissions problems but it is not the cause of the mystery noise. But the dealer is doing right by me since they assured me that the $925.00 throttle body would fix the problems. So they set me up with a loaner vehicle 'till Monday, a 2005 V50 T. It is fun but it isn't my S60, if you understand what I mean.

If anyone has anymore ideas please let me know. Or if I now have your interest in the incredible singing S60, stay tuned for more details.

Thank you, Brian