The rotten egg/sulfer smell comes from the reaction in the cat. If it is a exhaust leak before the cat it smells different, plus you would definently hear it. Something like this would be hard to diagnose without actually smelling the smell. Clutch/brake smell isn't something I would consider "sweet" per se. The only thing I would consider a sweet smell is antifreeze.

 

Update: Replaced the two gaskets for the cat. Car still smells like ****. Gonna take it in to the dealer again and have them replace all the gaskets. If that don't fix it. I'm gonna raise hell becuase this car is not even a year old.

 

Rich car + black smoke = smelly exhaust lean car = no more black smoke = very little smelly

Mine stunk BAD (catless) before the tune, now even at idle inside of a garage it doesn't stink (garage door open, exhaust pointing out... I'm not THAT stupid, nor do I sit there and sniff it, but it does have a TT on it, so it idles while I'm getting crap out of it)

 

My friend riding behind me yesterday said mine smelled and had smoke comin out when i gave it gas. I know i've got a turbo back exaust but i'm not sure if its the stock cat. I bought the car with the exhaust on it and didnt get the details about the cat.

 

what exhaust do you have?

 

DNP Stainless header
RMR 3" Stainless downpipe
Apexi GT 3"

 

Dude, did you check your pants?

 

bump?

 

I run my car with Helix cat-deleted all the times. No smell.

 

err?

 

get a new cat and clean the exhaust pipes