Thread: squeal noise from engine when under load

Hey, so I recently started to have an odd squel noise almost like letting the air out of a ballon. So I found metal in the super charger and replaced it and nothing. Seems as though when it squels the care has problems sucking in air. I am thinking maybe an intake gasket is letting air out or maybe even a wastegate? Some ideas to check would be great

On idle and start up it is fine, even revving up to 4k while in park there is nothing but once you give it lots of gas and the super whine kicks in is when I hear that squel noise

Forgot to mentiom 2000 grand Prix gtp

sounds like a vacuum leak. do you have a scan gauge that reads boost and/or long term fuel trims?

The DIC isn't working but would a loud squel come from a bad vacuum. Even driving it is fine unless you are asking for some power. Like I said the second the super kicks in it has a lot of trouble. Another point to mention is before this happened I could hear large amounts of air rushing into the intake, now when I give it power it almost sounds like air is pulsing in and out of the intake

still sounds like my previous diagnoses

Ok I will have to take a look, thanks for the help I will get back to you if this was the solution but other comments will be greatly appreciated

Well the cold start with a whistle I believe would just be the supercharger. Mine squeals whenever its a cold start up. Do you lose power and such to? We have it down to 3 options, vacuum leak, head gasket leak or intake leak. ripping it apart this weekend to see what's up