wow had alittle scare today

[PhantomZ28]

well i'll get to the point. i was driving home from classes today when i suddelely hear this LOUD rattle comming from unde rmy car (mostely where the shifter is) so i freak out thinking my transmission gears are commin loose. so i take it to TRC (tranny shop) and they ge it up on jacks and thankfully its jsut a noise in the cat. now i'm just wondering what coudl of gotten in their?? its ont eh passenger side. anyone have any idea?

[immgeorge]

Your cat is prolly falling apart on the inside... The honeycombs are coming loose and rattling around... time for a new cat.

[Iceman10129]

i know exactly what you mean, I have the exact same problem but it only is reallly bad when its in reverse, or at like a stop light, jsut sitting there. Until i get it fixed you can put it in nuetral and makes it quiet.

[Dave M]

If it's defiantely coming from inside the cat, it's time for a new cat. As said before, the ceramic honeycomb structure inside can break apart and rattle around in there.

[PhantomZ28]

yeah its definately in the cat. i had my ear as close to the cat as possiable w/o burning myself and itwas comming right from it. but hey i'm thinkin of gutting the cat? (i have NO MONEY fr anew cats) i got the simulators so i wont trip any codes. is this a good idea or bad? ive heard so manymixed reactions. i'm not really looking for performance buti woul wlike to sound alot meaner (got a 3 inch cat back exhaust with american thunder delta80 series muffler

[CLWILSON]

Gutting the cats might cause problems passing Ca. emmisions test.

[PhantomZ28]

i dont need to care abotu ca emissions i'm movin to canada b4 i need to have it tested

[Joe 1320]

For some readon, OBD2 lt1s have a hard time with EGR flow when you gut the cats. It must be the dual cats and the fact that it is a backpressure flow egr. It is a 50/50 proposition that if you remove or gut the cats, you will get an EGR flow code that won't completely go away without a new program with the EGR delete. It's a crapshoot. Some throw the code, some don't.

[wolfdogs]

gremlins..........

run some irish whiskey thru ur throttle body....the fumes will drive em out..............
























get some aftermarket high flow cats

[Mark B]

You can get aftermarket high-flow cats on E-Bay REALLY cheap. I just ordered one for my beater, it came to $35 shipped. You will pay more than that for O2 Simulators!!

[Mike71]

we had some kids tossing marbles down people exh. pipes a few weeks ago..morons

[Black97]

Originally posted by PhantomZ28
i dont need to care abotu ca emissions i'm movin to canada b4 i need to have it tested

Don't know where you're moving to, but in Ontario we have emissions tests every two years until the car is 20 years old. Then you don't have to worry anymore.

Not sure how far the rest of the Provinces are with testing.

[SS_CarGuy]

I believe CATS have a 100k mile warranty since it's part of the Emission Control system. So you can probably get it replaced for free.