Ford Mustang Forum - View Single Post - Drive cycle & Rejected emissions - help!
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post #7 of (permalink) Old 03-04-2016
Stella09's Avatar
Joined: Jul 2014
Location: Dallas
Posts: 191
Originally Posted by dondino View Post
I'd like to know this as well. From what I've read they do not turn off O2's in the rear unless you specify off-road mid pipe, which I have not.
I was running long tubes and catted H and they were off in my race tune. I didn't request them to be turned off. The race tune is supposed to be more for off road use so I could see them turning them off by default.

2009 GT - Eibach Pro Kit Springs & front and rear sway bars | Tokico D-Spec | BMR panhard | Steeda control arms | ARH LT's w/ catted H | Borla ATAK | 2.3L Whipple | To Install - Mcleod RXT & Flywheel | DivisionX return style fuel system | ID1000 | Yet to Buy - Back to the drawing board...
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