Catalytic Converter

[Streets_of_Fire]

how is it going? i was just wondering how could you tell if your catalytic converter has gone bad? wheres the best place to get a replacement one? thanks

[swannjay]

essentially, cats don't really 'go bad', its the O2 sensor that does.

cats are getting expensive especially at the dealership because of a shortage of platinum (thanks Nelly...). you'd be better off with a high-flow. cheapest i seen was $99 w/o flanges but a muffler shop can fix that.

[fatboy]

doib

essentially, cats don't really 'go bad', its the O2 sensor that does.

cats are getting expensive especially at the dealership because of a shortage of platinum (thanks Nelly...). you'd be better off with a high-flow. cheapest i seen was $99 w/o flanges but a muffler shop can fix that.

dont listen to this guy. cats do go bad. when raw fuel or leaded fuel is introduced, it gets clooged. to test for this, you must vacuum test it. hook up a vacuum gauge to anywhere on teh manifold, and rev engine up to approx 3000rpm, the vacuum should stay steady. if it drops sowly, you have a clogged converter. best place for a converter is the dealer. aftermarkets tend to flow better but not be as efficient. and with newer cars with a post-cat o2, a catalyst efficiency code will pop up.

[swannjay]

okay yeah, im wrong about the part where i said "they don't go bad" . sorry about that. misinfo. bigtime

how can you tell if its gone bad??

reduced engine power. rotten egg odor out the muffler.

and yeah, get a cat from the dealership, then post on here how much it costs.