Is my cat going bad?

[scr8pn99camaro]

I have a bad rattling sound under my passenger side (obviously it must be the cat), is it going bad? I have a 72,000 on my 99 camaro. I read on other posts and people say that one sign of the cat going bad is it's rattling? Is this true or is it BS? I've already did a search on the site and can't find anything.

[dstrbd1]

could be, sure sounds like it. if/when you change it, check your plugs and wires.

[Ttop34]

My roommate had a truck where his cat was breaking up. It was quiet when he reved it but at idle it rattled.

[Ted]

I have a bad cat too, I haven't fixed it yet but can it cause problems being like that?

[dstrbd1]

your car doesn't run at optimum, your emissions are gonna be bad, and depending on what the exact problem is, it could cause other emissions equipment to go out after a while.

[blackfire99]

mine was bad and i heard rattling prior to realizing it...it stopped the exhaust flow by about 95%, i had to take it out and gut it...not smart, i later learned that you can take it to a gm dealer and have it replaced for free up to 8 years/80k miles...so get it fixed for free, unless you want the same problem as i have now...luckily i got a cat for really cheap, it is being welded in as we sit here now! hopefully it will be fixed now!

avoid the cat game!!!