ok i have a DiabloSport Predator Mustang Tuner on my 2000 mustang gt and i need to smog my car will is pass. or do i have to put back the Reg. settings back... i live in california so the laws are gay... feed back thank you

 

as long as it has cats ur good to go i think...i live on the other side of the country so im not too sure

 

I've wondered the same thing actually.....If it were me i'd put it back to stock just to be safe because doesn't the Diablo Performance tune turn off the rear 02 sensors on the H pipe?? I don't know if that's true or not, but I remember reading it on a forum somewhere and what you read on forums are always true! ha ha ha ha

 

Doesnt it give the option to turn the rear o2 on and off it doesnt do it without asking i dont think does it?

 

I think your probably right about it giving you the option to turn them off....I just read that somewhere. I would still take the tune out, just to be safe. We have crazy strict smog laws, especially is you live in the Bay Area or LA and they look everything and anything to fail people.

 

I dont think that it would cause the car to fail. if anything i would iamgine it would make it run cleaner cause its has optimazed your fuel timing tables etc....