[Cheapskate816]

08 mustang gt cat delete now the car smells of like the fuel is rich coming from the exhaust is that normal? Am I just paranoid? I plan to order a tune today...but some say if I dont do a cat delete then it will continue to run rich?

 

[Grabber Blue5.0]

Cat Over Protection

A tune will help but not eliminate the smell completely.

 

[1 Alibi 2]

Cat delete = smell.
Not sure what tune you're considering, " most " tuners won't turn cats off any more, been that way for several years now..

 

[jkeaton]

"Delete's cats, wonders what that smell is".....

 

[crjackson2134]

I guess it depends on where you live. When I went FI / Headers, my installer/tuner advised me not to go catted (I was going to until then). I'm told that it's not a matter of IF but rather a matter of WHEN the cats would get clogged, and probably destroy the engine (if not caught right away).

I took his advice, he did the install / Dyno-tune, it runs great and has a minor objectionable odor on startup / idle only. Once it's warmed up, it has VERY LITTLE noticeable odor at idle.

I have a couple of options if I need an inspection (which I don't since I register elsewhere). I can throw the catted H-pipe on there and go get it inspected, or I can go to one of many shops around here that don't look for cats.

My O2's are NOT turned off in the tune, and I get NO codes, and NO "Not Ready" signals. He's a great tune guy.