i've been noticing that my truck has a very nasty stench to it.. and it has a little bit of a rough idle which may have just been caused by the hypertech.. but if i watch the rpm gage i can see it wobble back and forth.. but what does it usually mean if your exhaust stinks?

 

like rotten eggs? if it's like eggs then you might have a bad cat because thats what mine smelled like

 

yeah something like that.. im sure this is the stock cat with it and their known for going bad

 

get it checked out asap... clogged cat could seriously end up in some damge to the heads...

check out my post i just poped for this dude with header problems.. i explain a simple test that you can do yourself to give you an idea if theres a problem with the cat before getting charged by a shop

https://dodgeforum.com/m_414524/tm.htm