Yes could be the belt you could have a weak belt tensioner is the noise worse with the a/c on?

Answered by saturntech9 (expert)
23,189 answers provided

I am not using air (live in Wisconsin). It happens when I accelerate and as soon as it backs down it stops. Leak in a hose?

Response from jkamke15
1 question asked

Sound's like you could have a weak belt tensioner that's what keep's your drive belt tight.If you have a/c on your car an it work's turn it on and see if the noise gets worse.

Answered by saturntech9 (expert)
23,189 answers provided

Did you ever get this resolved?

Answered by t5825db
0 questions asked

It seems to be known issue with resonator on the G6 HTCs. (g6performance.com) Maybe because of the exhaust's size, anyway had the same problem, whistling noise under acceleration between 2000 - 3000 rpm but no other time. Checked belts, tensioners, etc, etc, no joy. No longer under warranty I had a Magnaflow 10424 put in and that fixed all the weird noise, just sounds good. Good luck!
-jon

Answered by x44+
0 questions asked