How Can You Tell Which Cat is bad?

[TheKingSim0n]

How can you tell if you need to replace the right or the left side catalytic converter? I hear the rattle and it feels so much like its clogged like a bitch.... I am planning on changing it...

[killcrap]

hit it with your best shot.

[TheKingSim0n]

What do you mean by that?

[Ghost-Flame]

Hmm at 95,000 my 3.01 cat is still good, (r there 2?) are you going to replace them for insurance sake or are they bad. I think the dealer or a shop can check them before you spend all that money..

[Weasel]

I think he means get under there and smack them with a big rubber hammer to see which one rattles and which one doesn't. It's either that, pay for a backpressure test, or change the pair of them for magnaflows or something.