How do you know when you cat is fucked?

 

Referencing this thread http://www.acura-cl.com/forums/showt...hreadid=118814

It should throw code 67 - Catalyst System Efficiency System below threshold, defective catalytic converter

You also might notice an odor to the exhaust. If there is a hole in it, it would be louder depending on the size of the hole.

 

No codes to this point.

A hell of a lot of rattling/resonnance and the occasional rotten egg smell.

I think my nitrous addiction has fried the innards!

 

I'd take it off and check it out. If you're getting smell and rattle, id say it probably is the cat. I dunno how hot nitrous gets but that could be it, im sure factory spec wasnt counting on a 75 shot.

 

kittens?

 

my check engine light came on... when i brought to acura they said it was my CAT....

is your check engine light on???

 

No, it's not.

 

my check engine light came on and i went to autozone and they checked it and said it was my cat converter , but that since i do all short distance stop and go driving i probably have a lot of residue built up and that i just need to take my car on a long drive to burn the residue out. i still havent had a chance to do that ..... should i just take it off and clean the inside of it..?

 

ur cat may be falling apart but as long as your engine light is not on then your cat is still doing its job.

if it is rattling, the screen inside may be falling apart. if that is the case its gonna clog and you better get a new cat or say goodbye to your valves.

if your cat is completely f*cked, the O2 sensor will burn out within 3-4 days and your gas mileage goes to shit, but your car opens up more, i sacrificed the gas mileage for speed and sound about 14 months ago. thinking about putting a cat back on tho cuz i hate my car now.

 

i get a rubber burning smell....i thought it was my tires but u'll smell it with the car on and parking in one place....so its not my tires. could that be my cat too?

 

yeah my cat is fried too...to the point where i can smell it wit my windows down sometimes ..for as long as its been fucked up my o2 sensor is prolly done too... ...as a matter of fact the CL is goin for a major tuneup next week...cat n 02, starter, timing belt, headlight fuse (been driving around wit only my right headlight...thank god in PA they dont stop u for that but when i go home to NY for vacation i gotta drive wit the highbeams) ,suspension pieces n bodywork n paint (from my accident)...cant wait to get it back to its pimpin' state lol

 

I need to get my car up on a lift and see where the noise is coming from. Next step would be to tear the exhaust apart to find the rattling/excessive resonance.

It's really embarrasing to be "rattling" down the road! :thumbsdn:

 

Yeah, just hit your cat and if there's fragments inside, it needs to be replaced.

 

I dunno if u monitor the car talk, this is another reason for a funny eggy smell:

"
Figured out what the smell was, I had a bad battery. One of the cells in the battery was bad, causing it to overcharge and boil over, it was the fumes from the battery entering into the car.
"

 

wierdo lol

 

I had a 1987 ford bronco II when i was younger,
I managed to strech the timing belt one day, so the engine was dunping unburnt fuel in to the exhaust,
it was igniting in the cat,
melted my carpet and floor man on the passanger side,
melted the ceramic stuff inside the cat,
set it on fire and launched it out the tail pipe like a cannon
in to the bushes where it set fire to the pine straw
then to the fence !!!

That is how you know your cat is screwed =)

 

the rotten egg smell could also come from a broken valve stem...

 

Wouldn't it feel fairly screwy with a broken valve stem?

 

true..

 

ummm it will smell like sulfur.... and if you have a leaky battery, you really need to look under your hood more than you look at your indiglow seatbelt pads

 

I would fucken pay money to see that.

 

That would be quite entertaining!

 

 

not if your the one tryin to keep the neighborhood from burning down with a bucket =)