hissing noise

[pitsnipe]

I've been meaning to ask about this for a while, I have a 2007 Cobalt LS sedan and I've noticed that when the RPMs get over 4500 when I'm taking off fast or going to pass real quick on the highway, there is a loud hissing noise from the engine. It sounds sort of like a turbo or a supercharger with out the whine. My car is bone stock other than power locks I had installed when i got the car. Is this the stock intake choking off the car or is there a possible leak in the intake? I've never heard a car hiss loud enough to be heard from the drivers seat going down the road listing to Korn. Any ideas?

 

[squeek]

I've been meaning to ask about this for a while, I have a 2007 Cobalt LS sedan and I've noticed that when the RPMs get over 4500 when I'm taking off fast or going to pass real quick on the highway, there is a loud hissing noise from the engine. It sounds sort of like a turbo or a supercharger with out the whine. My car is bone stock other than power locks I had installed when i got the car. Is this the stock intake choking off the car or is there a possible leak in the intake? I've never heard a car hiss loud enough to be heard from the drivers seat going down the road listing to Korn. Any ideas?

its just stock that way i have an 06 that does that with stock and an aem intake

 

[YelloEye]

Possibly the intake silencer has been removed from your car. If you get an actual intake it gets louder.

 

[pitsnipe]

Ok, thank you,I just thought it was odd I've never heard it on any other car before.

 

[YelloEye]

Its a bit more of a whistling noise too.