My car's exhaust smells like rotten eggs, and it has been like that for a while. The mechianics didn't know why, I was hopeing maybe you'd know.

thanks

You're mechs didn't know???
 

hmmmm.....thats weird?? sounds like a f'ed up catalytic converter to me, rotten eggs is the classic symptom!!! ASC certification, hmmmmmm....... :laugh:

This is a long shot, but check if there's anything plastic near the exhaust. I got that smell in my old Accord, and it turned out part of a plastic bag was stuck on the underside of the car and melting, giving that nasty smell. Also, you forgot the left foglight in the body kit :).

READ THE FRIGGIN ARCHIVES!
this is answered weekly! You've been around long enough you oughta know this one by now anyway!
(it's very likely you're Cat. Conv. making the smell. this is normal when they start to go bad).

if his mechanic didnt know what it was its probably not the cat because any mechanic would check that out first. thats gotta suck though.

If you have a 5 spd, clutch fluid that is leaking out onto a hot exhaust manifold will cause the same sulfur smell. Also, different brand of fuel use different amounts of sulfur. If the smell is really bad after WOT runs, then it's probably the cat showing signs of being clogged. Slight sulfur smell after WOT runs is normal.

hmm, I checked the FAQs, didn't see anything! Now..my dad keeps saying, the cat can be replaced when it dies and emissons wants us to replace it. What happens if the cat dies? anything bad? does gas mileage drop? how much MPG do you guys get for normal driving? Mine comes out to like 16MPG. How much does a new cat cost? thanks

I did a search and found a couple posts, but they were about a month old.. I guess it was from the other board, but it's still a common problem.. sorry bout that.

it's recommended to replace it whenever it goes bad, whether you have to go to emissions inspection soon or not..
a dead cat can cause power loss and loss of fuel efficiency.. 16mpg isn't that bad, but not great either.. I usually get about 16 in my car, mostly from my driving style though.

I think you can get new cats for around $100-150. check the warpspeed website, as they sell 2.5" carsound cats for $125.

Ah don't worry about it. I'll add it to the 3rd gen resource, then we can yell at people :).

As for the 16 MPG, I don't know if it's my cat, or my driving style, but at 100k, I think the cat is prolly dead.

For the 2.5" cats, do they not pass emissons?

That's definitly your cat!
 

When your cat gets old, it breaks down inside and closes off all the holes that allow the exhaust to flow through. Now, as these holes close up, you get more back pressure to the engine which will make your car very doggy in performance.
Replacing the cat is expensive, sorry to say. Check around for prices and make sure that your not buying a cheap POS to replace the one you have. Make sure you try Courtesy Nissan b/c they'll give you a discount. Just check out
Courtesynissan.com and then give em a call some time.

Re: That's definitly your cat!
 

a Random Tech free flow cat is cheaper than a Nissan cat :)

Re: Re: That's definitly your cat!
 

will it pass emissions?

errr?
 

Ummm........I don't think it will, but if you want to try, tell me how it turns out. I have mine registered in Tennessee, so I don't have to put up with that BS. Good luck.

Re: Re: Re: That's definitly your cat!
 

emissions will not be a problem. the reason the RT cats are more free flowing is mainly due to the larger inlet/outlets, which provide better flow (and are better matched with custom piping going into the inlet).