99LS1Z28

I installed my QTPs about a month ago and now my driver side cat on the catted y pipe broke up. It doesnt seem like it should have happened anyways b/c I have all of the emmisions hooked up. I didnt get the car tuned by anyone but I did use the slp diablosport. Is that a problem or could it just bea defective cat. And if it is do you think QTP would send me another?

conan

iTrader: (5)

The cat broke up... do you mean the honey comb ceramic is falling out, or rattling around?? If so only being a month old I would hope QTP would take care of you.

02SS:ZEUS

iTrader: (16)

I think my passenger side is doing the same thing. I can hear some rattling coming from that side of the car, and my car is getting louder. I've had mine in since I put my LT's in about 3 months ago...but I had the A.I.R. system removed, so that might have something to do with mine.

99LS1Z28

yea it just started to rattle around and i stopped driving it before it breaks up because i dont want my exhaust to get clogged.

mcflyz28

if I get two years I consider myself lucky and that's with a tune, probably why I oredered true duals cats are expensive

Order 66

If you didnt get the car tuned, that could be the reason the cat went bad. You run rich when you put on headers and the extra fuel wont help the life of the cats.

99LS1Z28

yea but it should have lasted longer right. i mean come on. about 1 month out of the cat. And I dont drive it all of the time. I might have put like 300-500 miles on the car scince the install.

Bad30th

iTrader: (13)

Actually, as long as there's not extra air to go along with it, extra fuel can actually cool the cats. The stock tune uses COT (cat over-temp) protection to cool the cats when they're too hot by adding extra fuel.

Now if you're missing a spark plug or have an air leak and there's extra air getting in with the fuel, it will break them up in no-time.

Rob (Bad30th)

Order 66

You would be suprised. Stock cats would not last if the car is running rich.

99LS1Z28

What do you mean by air leak. Like an exhaust leak, a leak in one of the air tubes or a leak somewhere else?

Bad30th

iTrader: (13)

Any air with enough O2 in it to help combustion when the fuel hits the cats.

BTW, I'm also not suggesting cats will last forever on a rich tune. This was really more of an FYI/general statement than a "this is what's happening to your car". Cats break up for lots of reasons, rich tunes included.

Best bet is to have your tune fixed before you have your cats fixed.

Rob (Bad30th)