Whats up guys,

I am hitting over 20 psi(according to boost gauge and 20.4 on intercepter) with my 2.9 I know that this is not possible so what could be the problem? A guy I know said vacuum leak. so should i get some carb cleaner and spray the lines until it idles up or what?

thanks in advance

 

Clogged cat.

 

/thread

 

Yep I would have to say you have a clogged cat. I had the same thing happen to my car, GM will replace it.

 

yea more then likely a clogged cat but if you have a buddy with the same boost gauge try his to make sure its the gauge

 

make sure your intercooler pump is working...mine gauge would hit up to 20psi while huffing non-intercooler air into the motor...put in a new pump, and only saw 17 from then on with a 2.85 pulley

 

Yeah, I see 15 from a 2.9.

 

i have an interceptor gauge that says same thing. The car still pulls hard. so I should just take it to chevy?

 

yes, if its under warranty, take it!

 

yea mine is clogged and my exhaust sounds like this

http://i7.photobucket.com/albums/y29...=slicks012.flv

cant even hear exhaust at high RPM....just sounds like a whooshing noise

 

no cat ftw

 

Go cat-less!! Im seeing 16.5 with a 2.9....

 

thought about it. could i just go to the exhaust shot and have them cut the cat and weld a pipe on there in its place..gottta save my money, im going on vacation in 3 weeks. cant splurge on a catless dp.

 

just take your dp off and clean out your cat that way and put it back on lol

 

Agreed on the cat.
I saw 16 lbs. when I had my 2.9

 

a muffler shop, is not allowed by the state to remove a cat from a car that came with one from the factory if they are e-check certified(meaning that an e-check station will recommend them to you to fix your problem)

 

yea ur cat is stopped up same thing happened to me

 

yup just get rid of the cat theres no room for cats in cobalts!!they belong in the barn

by the way my car pisses everyone off it so loud i love driving down the road and getting looks of disgust from everyone i pass its truley great

 

If you want to go cat-less let me know and I will get you hooked up. There are only 2 shops that will do that around here that I know of. An they both are the best in town.

 

sometimes the loudness gets annoying tho. i had a 2.5 inch turbo back exhaust on my turbo scion tc. it sounded bad ass, but got annoying just driving around after a while.