red2012

I have a '12 coupe 6m with 13k miles that i bought new and have always used high test top tier gas, SHELL, SUNOCO etc,,. For about the last 6k miles anytime i let er rip it really stinks for about 5 seconds after than goes away. It never used to do that. any ideas? Car runs fine. MPG'S have never changed.

gaklid

Maybe you're crapping your pants whenever you jump on it

NevadaVette

Check your cabin air filter to see if there is anything unusual.

red2012

Good one as with the cold winter in NY sometimes the car does get away from you and you have zero traction and you do **** in your pants sometimes.

383vett

Change your diapers before you nail the pedal.

su8pack1

Time for a bath? Sometimes the cat converter will smell like that.

CCIE

I've noticed this with my '12 GS. It's faint, but it's there. My guess is the new secondary cats are junk, defective. I intend to bitch up a storm about it at first oil change.

Big Dan 427

You may be cleaning out the cat Ron! Can't imagine why it would have too much build up though being so young!

Flh Den

There's sulfur in fuel additives; your engine isn't burning it completely and your catalytic converter is storing it and then releasing it as hydrogen sulfide when you add load to the engine and force more air through.
Try switching gas stations. Sometimes an engine misfiring or out of tune might cause this as well, but not likely given the age and mileage..

red2012

I'M going in for a oil change tues i'll mention it to the dealer and post up with any relevant info i find out.

CCIE

Thanks. Subscribed.

red2012

I know DAN thats why i always use top tier gas to avoid any build up that might occur with a cheaper brand gas if thats at all possible. would a bottle of TECHRON do anything but as you said DAN the car is fairly young, it would be hard to imagine a build up of anything this early in the game on pretty good gas.

Flh Den

I just found this post on a Lexus forum, same complaint as you had.

"Just to confirm, I had my car checked out at the dealer and the mechanic told me due to certain brand of gasoline have more sulfur. That will create the foul smell and it's normal under hard acceleration".

The smell you are smelling is hydrogen sulfide (H2S). It results from using fuel with high sulfur content. (Much of the fuel sold in the US contains a LOT of sulfur -- much more than is legal in Europe, for example, though the Govt. has mandated a reduction to Euro sulfur levels in Diesel fuel over the next several years). You can sometimes reduce or eliminate this problem by changing brands. That is often not a permanent cure since refineries usually buy from a variety of suppliers and the amount of sulfur in any one brand varies as a result.

Big Dan 427

Posts 9 and 13 are well stated Ron! Not sure if Techron will help in this case but what could it hurt?

LawrenceFromTorrance

Just try Chevron, it has techron in it.

arrie

arrie

My car is 7 years old and I find that if I start to smell "that" smell, I go on a highway, hit her HARD, clean her out and problem solved. Have zero idea what it is, but my fix always works. Thanks for the info...I have always suspected Cat Converter....rotten eggs

Mad*Max

it is the sulphur in the gas like some others have stated, if you remember your chemistry from school then you'll know that H2S smells like rotten eggs

GrayC5

As mentioned by flhden above, it's quite likely the gasoline you're buying contains a higher sulfur content than most others. All gasoline contains some amount of sulfur. In addition to the smell, the sulfur, especially in gasoline with higher sulfur content, can also foul a car's fuel gauge sweep/sending unit, causing it to not work properly.

Try some other gasoline stations in your area, preferably/hopefully ones that get their supply from a different fuel jobber (wholesale marketer). Each jobber can supply gasoline to any number of different branded stations as well as unbranded independent stations. It's likely that the gasoline with higher sulfur content may be coming from one or just a few and not all the jobbers that supply gasoline stations in your area.

Good luck!

ls1121

Big Brother forcing fuel companies to add junk to your gas. lmao