I just finished installing my plenum. And for some reason the engine is giving a whining noise, almost like a squeaky belt but louder. Sounds like its coming from the plenum itself. It also squeals loud when you turn off the engine. Im stumped. I've taken it off and put it back on 3 times now and nothing looks out of the ordinary, even checked to see if there was something stuck in the lower plenum (couldn't really tell). Has anyone else ever encountered this before? I've done the install before and never encountered this before. Any ideas fellas?

 

Anyone?

 

Am I the only one whos ever experienced this?

Well any how, I checked all the hoses for leaks and didnt find any. Im going to take everything apart one more time and replace the gasket while Im at it. I hope this works. Im pretty sure its a leak cause the RPMs are up a bit. I just cant pin point it.

 

Call me maybe I can be of some help 615-327-4159
Doug

 

Is the car idling normally? It sounds like you have a leak. Did you check the 4 small bolts you put in the lower plenum to plug the holes?

 

Replaced the lower gasket and took my time. Idle is normal now and no squealing.

 

have you checked it with a vacuum gauge?