Quick cat. question

[88red4cyl]

This is on the 99 LTZ. I noticed a bit of exhaust fumes at a light this evening, so when I got home I kinda checked it out. The exhaust is really light colored and smells a little bit like sulfur.. Could a cat going bad be the cause of this? The car isn't throwing any SES codes, so I thought I would ask you all.

Thanks!

[LuminaPower92]

Possibly, I think a magnaflow high flow is in order. 100 bucks plus shipping.

[AWeb80]

Or, Run No Cat If You Can.

[spiderw31]

Possibly, I think a magnaflow high flow is in order.

 

x2

[3.1cutlass]

Or, Run No Cat If You Can.

x2

[88red4cyl]

Or, Run No Cat If You Can.

 

We don't have emission testing here, so I guess I could.. What is involved with removing the cat? I would also assume I would have to take it somewhere to have some pipe welded in also??

 

Does is sound like the cat could be causing the smoke though? Just kinda worried me...

[Hal H]

generally, the sulfur odors inidicate a rich operating condition.

 

If it continues it could overheat the cat, and make cause the "honeycomb" ceramic element to break up, which can clog the exhaust downstream (bends, or if you have resonators)

[jdcutty]

step 1: remove cat with sawzall

step 2: weld in straight pipe

step 3: take cat to scrap yard

step 4: laugh all the way home with your new found wealth

 

[88red4cyl]

Is there anything special that you have to do with the downstream o2 sensor?

[AWeb80]

yeah, spend ~$40 to get a O2 simulator......you will still be $$$ ahead....I got $143 for my cat on the GP.

[19Cutlass94]

You can actually get ALOT of money fot cats. now. Take it somewhere to get rid of it, and they'll pay you for the materals in it.

[Andrew]

you can get a dynomax cat from summit for $55 plus shipping.