HACKGT350

sorry i farted haha smells like bad cats time for a new h-pipe

shaners90lxhatch

A common misconception is that sulfur odor means the catalysts are bad. This could not be further from the truth. Catalysts fail in one on four ways: physical damage (car bottomed out on them), broken brick (rattles and chunks of it are in your muffler), meltdown (backpressure) and inefficiency (downstream oxygen sensor voltage mirrors the upstream). The odor you smell maaaayyyy be more prevalent if the catalyst melts or becomes inefficient but you would notice a power loss or have codes if that were the case. The sulfur odor is due to crap gas. Sulfur is naturally found in gasoline but is found in high levels in poor quality gas. Sulfur dioxide does not come from the internalcombustion event, rather from secondary combustion in the catalyst. This is why you never smell it vehicles without cats. Basically your cats are getting hot enough toburn the sulfur in yourcrappy fuel. It is possible to smell this more often if your cat is running at an abnormally high temperature. Most of the time it meansthe arab you bought gas from sells cheap fuel. Put a few tanks of good stuff through it and the smell should goaway.

91RedHatchback

i never go below 92 octanes on my fuel. I just got the car back with a new engine and it started doing that. . . would putting the smog pump back on aleviate that smell?

91RedHatchback

looked under the hood...and noticed the carbon canister was busted, i went to a junk yard and got onw off off a 5.0 truck and that solved the issue!!!

2002GTAUTOVERT

itsthe smell of horsepower