2002 Volvo S60 Q&A

2002 Volvo S60 Question: We have a 2002 S60 Volvo(not turbo charged) that makes a whistling(sucking)noise

We have seen a fix for a turbo charged Volvo, but this car is not turbo charged. The other fix was for the PCV valve. Please help -
Answer 1
Vacuum leak someplace. Have it smoked or mechanic check it. -