robertbartsch

How do you know if your cat convertors are destroyed?

I can't pass NY emmsions. Last year I passed and this year I have no additional performance mods....

gaga

Robert, any luck finding an OBDII station? My friend in tarrytown knows of one... r u throwing any codes? Hopefully this is the last year we will have to deal w/ emissions!!

gaga

also sending u a pm...

thenewb

iTrader: (2)

smells like rotten eggs?

Muffracing

Try Changing your O2 sensors, if you have them. A bad O2 will make it smell kie rotten eggs.

Z-286speed

You will smell something bad, like what thenewb said. They will just smell really really bad. Or if you can hear them rattling.

Flawless02SS

iTrader: (9)

yeah your exhaust should smell bad

Midnight F-117A

Smells like a rotten egg, the '95 Jeep Grand Cherokee I leased did that around 60k, the emissions warrenty covered that, it had new cats installed.

777

iTrader: (21)

yup...the crappy smell is a sure sign of crappy cats...

TooSlow02

99% of bad cats rattle. They go bad either from physical damage, or overheating. Either way, the "honeycomb" substrate breaks apart, and they rattle. The 1% of cats that don't rattle are destroyed by contamination, usually by silicone or the use of leaded gas. Tap the cases with a hammer, or your fist if they're cold. If they're bad they'll rattle. Bad cats are supposed to set a fault code, but I've seen many cars with bad cats and no faults.

cm02WS6

The cat will rattle until the whole thing breaks apart and gets blown out. Just because your cat doesn't rattle doesn't mean that it is still good. It could have completely blown out already, but you just didn't notice it. Two have blown out on me.