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Topic Review (Newest First)
07-31-2007 06:42 PM
Triple88a It moustly smells at idle though.. rev it at idle few times.. maybe that might get the smell going. Not really a way to check the cat.. also i think the check engine light should go on if its bad anyways..
07-31-2007 06:38 PM
Kelly M. Thanks for the suggestions. I will check the vents.

Triple88a - burnt kerosene is a pretty good description of the smell. Is there anyway to check the cat w/o taking it off?
07-31-2007 06:04 PM
Triple88a good idea..pull over and check that out when you get the smell.. I think the vent for the front diff is on the drivers side of the radiator.. its connected with a bracket to the top radiator bolt right next to the coolant resvoid. Its a rubber hose with a white cap on top of it.. run your fingers and see if you get any liquid on your fingers.. The rear vent is ziptied to the fuel filler neck..
07-31-2007 05:37 PM
4point What about Gear Oil, it has a very distinct odor different from other oils. Mabey one of your Diff's are too full and its over flowing through the vent.
07-31-2007 05:28 PM
Originally Posted by foxinthemudd View Post
my first thought was that it was your cat, but usually they smell like rotten eggs like BLK said
Or burnt kerosene if the honeycomb is all messed up on the inside. A buddy of mine had a cat problem.. so when he got it replaced they showed it to us.. basically the honeycomb on the inside was all burnt up so there was a huge hole in the middle of it so the air was going straight through like it wasnt even there... Just smells like an old muscle car with straight pipes.. that would come out when idling on the stop light though which you say you dont have.
07-31-2007 09:29 AM
foxinthemudd maybe its your flux capaciter getting ready to engage .

my first thought was that it was your cat, but usually they smell like rotten eggs like BLK said. don't know buddy, like everyone said just start poking your nose around under the hood and underbody areas.
07-31-2007 12:41 AM
Triple88a Hmm i'm guessing drive it somewhat hard.... stop it and go under it and sniff around and hopefully you will find an idea where its coming from. If it doesnt smell when not mooving then it cant be something burning in the engine compartment... turn on the heater and see if you get some smell that way..
07-31-2007 12:18 AM
Kelly M. My 98TJ - there is no or little smell when it is stopped.
07-30-2007 11:19 PM
Originally Posted by Dare2BSquare View Post
Hers was the residue from people who crossed her stuck in her tire treads, and rotting.
2X.. i think some pieces flew on the exhaust manifold too..
07-30-2007 10:23 PM
my98tj could it be the catalytic converter breaking in? don't huff the exhaust pipe, but does it smell like that when it's parked and just idling?
07-30-2007 08:30 PM
Originally Posted by 1BLKJP View Post
Hey Tiny, did you ever get that smell to go away on your rig? Weren't you having the same time of thing?
Hers was the residue from people who crossed her stuck in her tire treads, and rotting.
07-30-2007 08:00 PM
1BLKJP Hmmm, I would think that if it just has a few hundred miles on it then it would be just some residual spillage.

I'm not 100% sure what I even think it is.

Hey Tiny, did you ever get that smell to go away on your rig? Weren't you having the same time of thing?
07-30-2007 07:57 PM
Kelly M. Hi Jack:

No sulfur or rotten egg smell. It is more of a petroleum/chemical smell with a little bit of a burnt smell to it.

Kelly M.
07-30-2007 07:51 PM
1BLKJP Hmmm, So it doesn't smell like rotten eggs at all?
07-30-2007 07:50 PM
Kelly M.

I am trying to diagnose an unsual smell in my TJ at medium speeds. The smell is like roof tar mixed with pesticide. You can smell it above 20 mph and below about 50 mph with the top on or off. I thought it might be the transmission fluid, but the dealer supposedly checked that on the recent service (3000k) and said it was fine. I am thinking of just replacing it anyway. I recently did a long haul through the desert towing a small/light boat.

Does anyone else get that smell, or have a suggestion of a cause. It does not appear to the typical new paint/coating burn off that sometimes comes with a new vehicle.

I would appreciate the groups' help. I have an 06 X 4.0L auto 3.73 with 06 Rubi wheels and MTRs (31s) 3K miles.


Kelly M.

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