Noises on 2002 Pontiac Bonneville

When i accelerate there is a hissing noise you can call it coming from the engine or dash board. someone said it was almost like air coming from the window but i know its not cause i have had my window down and can still here it. I am just wondering what it could be.

Asked by for the 2002 Pontiac Bonneville
Exhaust leak or exhaust restriction. Does the car have good power?. If not maybe the converter, they sometimes will cause a hissing noise when there stopped up. Air intake resticted or not assembled correctly? Just guesing from your description.
1 answer