rotten eggs smell

[jrvelasco]

i have a 91 240sx hicas with a stock ka. when i rip (drive fast) it smells like rotten eggs does anyone know what this is. it goes away when i drive save gas mode. :confused:

[SoguRacing]

probably sulfur. haha dont know where it's coming from. maybe you car has chickens in the exhaust!

[projekt_s13]

Sometimes when i rip it smells like rotten eggs too :keke:

[SoguRacing]

Sometimes when i rip it smells like rotten eggs too :keke:

haha :eek: +1 for you

[KiLLeR2001]

i have a 91 240sx hicas with a stock ka. when i rip (drive fast) it smells like rotten eggs does anyone know what this is. it goes away when i drive save gas mode. :confused:

raw eggs are NOT a form of fuel. :love:

[Sean14]

Is it your clutch? Rotten eggs is a weird way to describe the smell, but I could see it, i guess...

[SoguRacing]

dude, its t stock KA, he's probably burning some sort of fluid or something. maybe something is leaking^

[shmiddy]

my brothers sentra had the same problem. we never found out what it was.

[DreamN]

Usually it's your cat. Change it. Though you could always try switching gas stations or fuel grade. A nice "tune-up" ( spark plugs, plug wires, fuel and air filters, and oxygen sensor, and clean the fuel injectors) wouldn't hurt either. If that doesn't do it, just replace your cat.

[crazybb]

maybe the battery...

[Devil Man]

its your cat

[mrpeepers]

theres a cat under the car















j/k sulfur is one of the elements that pass through the exhaust the cat is supposed to process...if you smell it, your cat is burnt out

[2_fast_240]

Yea, my car does the same thing. Ive also heard a brand new cat will do this. Obviously this is not your case.

[Maxstyle]

Could be your upper lip. But more than likely your Cat

[turbocarslut]

Rotten eggs (sulfur) can only come from two things in your car.

1. Battery
2. Catalytic Converter

[bbejj123]

as they said it may be because your cat is burnt out but make sure your not running lean because cats work better when at a richer a/f ratio let us know how it turns out

[Devil Man]

Yea, my car does the same thing. Ive also heard a brand new cat will do this. Obviously this is not your case.

dont listen to him ever again.

[2_fast_240]

^Care to elaborate there bud. What exactly did I say that touched you wrong?

[Tulok]

well, i dont think you touched him per say...

I think its your cat by the way, but, how long has this been doing it? try to switch to a different grade/fuel station.

[jrvelasco]

thanks for the help.

[cornercarver240]

rotten egg smell is sulfur, it could either come from your battery which i don't think so since you said it only happens when you drive it hard. the other place it is is in the gas. unlike what people have been telling you though, replacing the catalytic converter will not help it, it does not filter sulfur. sulfur is an inert gas, meaning is isn't going to burn up, it will enter your engine and exit your engine in the same form. it could just be the quality of gas you are using, it might have a higher sulfur content. if it never happened before it could just be you are expelling a lot more fuel than used to, in which case you might need a tune up like was mentioned before.

[S14DB]

You are smelling hydrogen sulfide. The wash coat on cats are designed to deal with H2S.

If it's the stock cat it's prolly toast and you should get a new one. There are gas additives that can attempt to clean the cat. But, if you don't have a lot of miles on the cat it may be something else.

Make sure you don't have a Oil or coolant leak. The phosphorus in some coolants and the zinc in some oils can contaminate the cat. Also, gas additives such as MMT and oil additives that have ZDDP can contaminate the cat over time.


Cliffs, I think your cat is toast cause the smell should go away as you heat up the cat. Make sure you don't have a oil or coolant leak into the exhaust(HG leak). Replace it and be happy.