after i hit 5 k and highter on the rpms i start hearing a pssss weird ugly noise from the front. its not and exhaust leak my dad said so i dont know what it is. could it be the sc blow off?

 

hts normal, evap vent solinoid i think

 

do you have an intake?? if not, then its prolly the airbox you hear. put an intake on it and you'll REALLY hear it...

 

does it sound like a smooth flowing pressured air sound?
or does it sound more like a "crackly" air sound.

because ive found that knock can sound very much like that in these cars...

 

it just starts going pshhh slowly and it gets louder but kinda like a bov but not all like that

 

blower whine possibly?

 

fail ....although i dunno what u mean i don't really know that noise that ur explaining..although maybe im just not paying that much attention to it any more cause i've had the car for almost 2 years

 

Sounds like its just air trying to get sucked through ur restrictive airbox. Get a CAI or just do the airbox mod.

 

could be your bypass valve opening up.

 

um its not the whine lol i know what the whine sounds like lol but i didnt have that noise before so its weird i guess ill take it in the dealer and see if they find anything wrong

and no i dont have and intake or drop in filter or air box mod.

 

ugly noise?? whats ur deal..go return your cobalt and buy a "smartcar"... then u wont have to worry about that "ugly" noise...all u have to do is plug it into your wall...lol

mine does it when im up around 4500-5000 it souns like psssh....its airflow...

 

what my deal..umm excuse me? Im not here to heard you being a smart ass lol, I did the post because I didnt hear the noise before and im not too familiar with these cars im still in the learning process and I prefer to get opinions on here and all just to make sure its something normal instead of it being something wrong and me ignoring it and ending up with a bigger problem..

but btw thanks for atleast letting me know what it is lol since u say you have the same noise