ok i have an after market air intake on my car and after market down pipe but everything else is stock my superharger is making a whistle noise that its never making befor and i cant figure out y its making the noise can anyone help me or have ideas....

FYI it only makes the noise when i get on the throttle and im NOT mistaking it for the whine from the superharger.

i also pulled my aftermarket air intake off and it still makes the whistle noise ,also replace the bypass valve hoses and still didnt make a difference....

if you have any suggestions please share!!!!

 

Sure it's not coming from the serpentine belt?

 

vac leak

 

Change your catalytic converter. Excess pressure from a clogged cat can cause a weird whistling sound from around the blower, which lots of people will mistake for a vacuum leak or a squeaky belt.

I know, because I know exactly what sound you're talking about, because it happened to me.

Have GM or a trusted Mech. check out your cat. Bet it's clogged.

 

It was a clogged cat