lol i know its hard to make noises in text but would it be a higher pitched type of hiss? becuase i think i may have a clogged cat, plus i'm boosting like 15 pounds at 6 grand. what are some tell tail sign yours cats going bad?

 

Kinda like a meow, but with more of a garbled tone, I don't know really how to spell it, but it's pretty sad, you swear they are choking on a hairball or something.

 

so then this hiss sound i'm getting isnt a clogged cat? and i know its no tthe blower, when i hear it if i put my head near my cd player sounds like i'm centered on it,and sounds like its coming from the engine bay, which to me indicates the cat... but i'm not sure. my idels is kinda sputtery but not real bad.

 

When my cat was clogged on my dodge ram. You can tell. My truck sounded like a vacume. There was crap for power and acceleration.

 

Check to see if you're overboosting. That's one way to tell.

 

yeah like i said i'm pushing 15 pounds on stock... everything.

 

What's your vacum read at idle? This most definitely sounds like a clogged cat.

 

Damn, I was thinking of posting something sarcastic like this, beat me to it.

 

Funny thing is that he didn't get it, and I think he took me seriously. Look at his reply!



You could have a Exhaust leak, but that's more of a sputtery noise. IF you ARE overboosting like you say you are, it's probably clogged, because all of the back pressure is built up. I'd get it checked, a clogged cat can be serious.

 

about 15-20 hg

 

If you have an inclination that it is clogged and you are boosting 15psi on a stock setup, your cat is most likely clogged.

 

sounds like your pioneer tweeters are blown?

 

I clogged my cat a few weeks ago and yes the car ran like **** to I put the stocker back on,Did you have any smoke come out the tailpipe?

 

not that i know of

 

What about a failing cat or Bad o2 ? are you getting any CELS ?

 

at what temp were u making 15psi? if its like 10degrees outside my stock 07's gauge at the top of 3rd will claim 15psi, but now that its 40-45 degrees outside itll only hit the 12-12.5 like its supposed to. o yeah i do have a cai w/ stock exhaust too. I do have a sputter aswell at idle, almost like a subaru. i see 18-22 inches of vaccum at idle and in gear letting off throttle will see 25-27 inches.

 

no codes at all. at here its like 60 degrees out and i'm seeing 15 psi.

 

Look at it after you let it run. had a cat glow orange on my gti. fn floor board was pretty dam warm to

 

its clogged. 2 of Mined hissed too. Trust me change it. Dealer won't do it but it takes months for an actual code to throw. I'm on my 5th cat so i can tell you from all your symptoms that that cats a gonner. Its only gonna get worse and your MPGs are gonna drop.