exhaust smells like rotten egg after hard acceleration. wtf?
02-16-2006, 04:13 PM
#22
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St. Jude Donor '06 & '12
Originally Posted by badass1g
ok so how do i know if its running closed loop?
02-16-2006, 05:25 PM
#24
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St. Jude Donor '06 & '12
Originally Posted by badass1g
im in slc utah.. i will be commin to vegas in bout a month though 
02-16-2006, 11:27 PM
#26
Burning Brakes
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Can you say to rich... Cats are suppose to smell like rotten eggs when they get hot from a rich mixture. There working fine just get your AFR corrected before you do burn them out... 
02-17-2006, 02:02 AM
#28
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St. Jude Donor '06 & '12
Originally Posted by Threed
Can you say to rich... Cats are suppose to smell like rotten eggs when they get hot from a rich mixture. There working fine just get your AFR corrected before you do burn them out...
02-17-2006, 09:18 AM
#29
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Originally Posted by AMERICAN_HP
So why is it that alot of cars smell like rotten eggs when the cats are removed??
I thought a car without cats would smell more like a lawnmower or possibly an old work truck than rotten eggs? I also thought with a proper tune it could actually smell like any other vette on the road just get a little more black soot than normal on the pipes.
Is there anyone out there that can clear this up for me?
02-17-2006, 10:07 AM
#30
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rich mixtures[fuel]through cats= rotten egg smell.cars without cats tend to smell more fuelly,not eggish.overcharging batteries will give you a egg smell also.
02-17-2006, 10:15 AM
#31
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Originally Posted by jedicowboy
I thought a car without cats would smell more like a lawnmower or possibly an old work truck than rotten eggs? I also thought with a proper tune it could actually smell like any other vette on the road just get a little more black soot than normal on the pipes.
Is there anyone out there that can clear this up for me?
Is there anyone out there that can clear this up for me?
02-17-2006, 10:54 AM
#32
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Originally Posted by Warp Factor
No cats smells like the old work truck.
02-17-2006, 10:59 AM
#33
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Cats are designed to run near stoichmetric 14.7/1 air fuel ratio. When you are running alot richer than that for extended periouds of time they will start to overheat or cook and you are smelling them start to melt. And yes they will either completely melt the insides (lazy mans way of boring them out) or clog up evenually depending on the temp/driving patterns.
A car without cats will just smell from increased emissions. Typical 3way cats will lower your HC/CO/NOX by 40% so mostly the only thing coming out of the pipe is H20 and CO2. So without cats it would be a totally different smell which with a good tune you probably wont notice much unless you have it parked in a closed garage and then you will notice untill you fall into a deep sleep and die.
A car without cats will just smell from increased emissions. Typical 3way cats will lower your HC/CO/NOX by 40% so mostly the only thing coming out of the pipe is H20 and CO2. So without cats it would be a totally different smell which with a good tune you probably wont notice much unless you have it parked in a closed garage and then you will notice untill you fall into a deep sleep and die.
Originally Posted by jedicowboy
I am really confused now. The rotten egg smell possibly comes from cats that are on their way out. Yet a car without cats smells of rotton eggs too? So they both smell like rotten eggs then, right?
I thought a car without cats would smell more like a lawnmower or possibly an old work truck than rotten eggs? I also thought with a proper tune it could actually smell like any other vette on the road just get a little more black soot than normal on the pipes.
Is there anyone out there that can clear this up for me?
I thought a car without cats would smell more like a lawnmower or possibly an old work truck than rotten eggs? I also thought with a proper tune it could actually smell like any other vette on the road just get a little more black soot than normal on the pipes.
Is there anyone out there that can clear this up for me?
02-17-2006, 12:00 PM
#34
ohh boy, first everyone was saying clogged cats, now its complete opposite 
so if i get offroad x pipe and delete cats, will that lean the car out at all? helping get rid off egg smell? i dont mind the old work truck smell, cause i dont want chicks thinking im farting eggs in the car, lol
so if i get offroad x pipe and delete cats, will that lean the car out at all? helping get rid off egg smell? i dont mind the old work truck smell, cause i dont want chicks thinking im farting eggs in the car, lol
02-17-2006, 12:01 PM
#35
Race Director
Originally Posted by JonLT4CE
I would refer to the troubleshooting manual. Rotten egg smell is not necessarily a bad cat. New Chrysler cars from about 20 years ago were notorious for this. It had to to with the catalyst and A.I.R. sytems combined. I could follow behind a new car going up a hill and smell rotten eggs. 9 out of 10 times it was a Chrysler product.
I would put it on a sniffer. Is it throwing any codes? Are you sure it's going in closed loop mode? It's tough to spend money using the shot-gun method only to find out that it was not the problem. Been there-done that.
I would put it on a sniffer. Is it throwing any codes? Are you sure it's going in closed loop mode? It's tough to spend money using the shot-gun method only to find out that it was not the problem. Been there-done that.
02-17-2006, 12:44 PM
#37
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Originally Posted by midqz
FoMoCo products also are notorious for this. Following the original Taurus many years ago smelled like a bad night of drinking beer and eating peanuts.
02-17-2006, 10:27 PM
#38
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Originally Posted by leatherbee408
Cats are designed to run near stoichmetric 14.7/1 air fuel ratio. When you are running alot richer than that for extended periouds of time they will start to overheat or cook and you are smelling them start to melt. And yes they will either completely melt the insides (lazy mans way of boring them out) or clog up evenually depending on the temp/driving patterns.
A car without cats will just smell from increased emissions. Typical 3way cats will lower your HC/CO/NOX by 40% so mostly the only thing coming out of the pipe is H20 and CO2. So without cats it would be a totally different smell which with a good tune you probably wont notice much unless you have it parked in a closed garage and then you will notice untill you fall into a deep sleep and die.
A car without cats will just smell from increased emissions. Typical 3way cats will lower your HC/CO/NOX by 40% so mostly the only thing coming out of the pipe is H20 and CO2. So without cats it would be a totally different smell which with a good tune you probably wont notice much unless you have it parked in a closed garage and then you will notice untill you fall into a deep sleep and die.
IMHO, get a tune and get your Air / Fuel ratios corrected and the problem will greatly improve.
Last edited by Threed; 02-17-2006 at 10:29 PM.
02-17-2006, 11:26 PM
#39
Melting Slicks
Originally Posted by Yellow73SB
Someone put eggs in your gas tank. 
This may be closer than you think.
Sometimes there is an excessive amount of sulfur in the tanks where you last bought fuel. If you recently filled the gas tank that may have happened.
It happened to me a few years ago when I bought gas out of town at a cheap station. The exhaust smelled awful. Next tank of fuel and the smell went away. Haven't smelled it since.
If this is a new problem, I would not do anything until you refuel again.
Last edited by corvette dave; 02-19-2006 at 12:11 AM.
