'08 R56S (stock) w/ 67k miles

I find that when I get on the highway after a cold start, as soon as I slow down/ get off the highway, it smells like someone Farted! rather embarrassing when I take someone out to lunch from work, like my boss… or his wife… HA… almost as soon as I get to the first traffic light, it smells.

I have recently, but after noticing the smell;
- upgraded to the waste gate spring from Alta
- DIY the intercooler muffler delete
- disconnected the "noisemaker" from the firewall

what am I to do?!?!

 

Is it similar to the the smell of diesel exhaust?
I get it too, randomly, usually after heavy acceleration and hard gear changes.
But, I have an '05 R50.
Other weird smells I get:
-Candle wax,
-Oil (but that's cus I have some drips)

Maybe check your cabin air filter. I replaced mine last year because of a moldy smell with the AC - which I still get when I first turn the AC on, and then again when I turn it off.

 

Is it a sulfur smell? Could be a bad cat...

 

Sometime a gas station will get a batch of gas that is high in sulfur. You could try and switch your brand of gasoline for a couple of tanks and see if the smell goes away.

Dave

 

mine is turbo'd not superchargered and i do see an oil stain where i park.

it is more of a sulfur smell, ill have to buy the cat-less downpipe and see if that helps!

 

Wouldn't an exhaust leak north of the cat cause the same smell? A catless dp can be more trouble than fun depending on where you live. and too many CEL's especially for a 2nd gen.

 

+1

dave hit it on the head

scott

 

Could be mold or mildew in the a/c intake if you have your air on recycle all the time , that can happen.

 

Gassing from a battery (hydrogen sulfide) will smell like rotten eggs,

If batt's up front, grille duct will pick it up, if in back it will come from hatch area.

Excessive gassing usually a sign batt is failing and or being over-charged.
(even the maint free gel types that have no vents still have an over-pressure vent that will release hydrogen and other when necessary).

 

 

Bet you a beer its your micro filter. That's the first symptom of the in-cabin heat/ac/HEPA filter going bad, is a sour smell.

Your dealership can replace this in the neighborhood of $87 and ask them to run a treatment of frigi-fresh through the vents. Its an antibacterial spray that will clean up any residual odor/mildew - we usually do not charge for this service if they are paying out of pocket for the filter.

 

$87?
I did it myself in 5 minutes, no tools, and a $25 filter from Canadian tire.

 

I kind of like the battery gas guess. It is really open behind the battery and a poor cabin filter could let about any smell through. I also like the AC drain vent being clogged, full of nasty water with no where to go. Stop and go sloshes the mess around.

 

sweet.

 

2 tanks later from 2 different stations and different brands each, still smells like ****! i think the issue is from either the cabin filter or the oil leaking onto my turbo...

 

HAhahahahaha!