Whtmax'01

OK this smell is so strong it makes my eyes water. It is strongest at high revs. But also very apparent at normal driving. Now, I changed the main cat, hoping that was the reason for the smell, but its not , smell is even stronger. Now I am thinking what can cause this? If the pre cat doesnt work then shouldn't the main cat at least get rid of most fume smells? And I checked for air leaks in the whole exhaust and cant seem to find anything.

SoonerFan

iTrader: (5)

dont know what to tell you. before i read your whole thread i was gonna say the cat was bad. it isnt the precats. i have a ypipe and have never had that problem even at start up before the main cat warms up

Menasor

iTrader: (2)

What kind of gas are you using? Brand and octane. I think Sulfur causes a rotten egg smell. I remember reading a Toyota TSB about a rotten egg smell and it stated that sulfur in gas is the cause of that. I don't think California Gas had sulfur but I think other states use it. At least that's somewhat of what i remember reading. My point is try using a diffrent brand of gas. have you tried doing that? Are you having any driveability problems. maybe someone else knows cause like i said I not fully sure, from my recollection the TSB was about rotten egg smell and something to do with the type of gas.

FameMax

Its your cat, you need a new one

03tgtmaxima

there was a post about this before and every one said it was the cats and then after awhile that day some guy said that they put an odorant into R-134 colant and that there might be a leak in the A/c-Heater system

03tgtmaxima

http://forums.maxima.org/showthread.php?t=358385

Whtmax'01

I did change the cat so maybe it is a leak in the a/c system.

SuperBlack2k2SE

I've always thought it was normal to smell the cat after you push your car a little, just about every car I've been in does that.

MaxAtack

hmmmm..................

ucdaznboy96

stinky smell...high speed...maybe you have the fear of high speed and you start sh*tting in your pants...hahaha...sorry...really don't knwo what the problem is...

Invictus

So who did you **** off in the last month or two? Take them all into a dark room and shine a bright light into their faces and begin interrogation. That is, if it doesn't turn out to be the heat / ac.

spiromax

I had to replace my cat after he crawled up into my engine bay to sleep a few night ago. Problem is, he was still in there when I started it the next morning. For a few days, the smell was pretty bad. I finally reached in there and scraped the bits out and got a new cat. This one doesn't go outside.

But seriously... I had this odor for a while in my Sentra. I switched fuels and that helped. In my Maxima, I catch a light whiff of it sometimes, but never enough to bother me, and never often enough for me to show it to the dealer.

paralyse

Sulfur smell = sulfur dioxide (? -- correct me, please, we don't do emissions tests anymore in TX on 96+)

The BEST way to diagnose this problem PROPERLY is to take your car to an emissions testing machine and look for elevated NOx, HC (hydrocarbons), Sulfur Dioxide, or CO2.

Most COMMON cause but not ALWAYS of SO2 elevation is bad cat converters but CAN ALSO be caused by sulfated gasolines, bad combustion (bad coils, bad AFR), etc.

Dexcool (aka Pink coolant) is "flavored" to make it unappetizing to cats, animals, kids, etc. The green stuff is still very "sweet" smelling (the glycol.) Neither one if leaking would produce a sulfur odor that i know of. Also, R134a leak big enough to where you could "smell" a large amount of it in your car would be a leak big enough to render your A/C inoperative in a day or two, so that would be easy to check.