Cats Maybe?

[sumo]

So ive noticed that my exhaust is smelling odd. Like A bad cat. No Dtcs. I wonder if it has anything to do with the BB tune. Im just curious if anyone else is like this. Srtong Sulfur like smell. Since i have no dtcs, Im gonna run it until one comes up

 

[07Burb]

I don't have a bb tune yet but every once in a while I get a similar smell. Not sure what's causing it yet as I can't repeat it at will at this point.

 

[Zed 71]

Does it smell like that all the time or just during startup? Also which brand/octane gas are you using?

 

[07Burb]

For me it's only on start up and I use 89 octane (mid grade)

 

[domin8]

for experience, I'd say the catalytic converter would be something you want to pay attention to.

 

[taylorjm]

Took me about a minute to figure out you weren't talking about the animal when you said your truck smelled like a "bad cat". I was thinking, what's a "bad cat" smell like? I know what a wet cat smells like, but a "bad cat"?

 

[sumo]

Took me about a minute to figure out you weren't talking about the animal when you said your truck smelled like a "bad cat". I was thinking, what's a "bad cat" smell like? I know what a wet cat smells like, but a "bad cat"?

Lol. Well a coworker behind me said when i Punched it out of the lot, he was behind me and said it stank and make his eyes water...LOL. Theres no Black soot or build up on the bumper. I use Shell and its tuned for 87 right now with the ocasional use of E85.

 

[Faceplant]

Bump!! My stupid truck stinks like sulfur pretty much all the time as far as I can tell. I run 89 or better all the time. My bro in law says his 07 has never had that smell. This truck is beginning to piss me off......

 

[sumo]

eh, i wouldnt say it pissing me off. I just kinda feel bad for those behind me....

 

[Zed 71]

At startup, IMO this is a normal condition. From my understanding, the engine is running a little rich at startup and it takes a few moments for the cats to warm up for max efficiency.