Ford Mustang Forum - View Single Post - Drive cycle & Rejected emissions - help!
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post #6 of (permalink) Old 03-04-2016
Stella09
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Joined: Jul 2014
Location: Dallas
Posts: 191
 
From what I have been told, on the race tunes the rear o2's are turned off. All of my race tunes turned them off and when I asked about passing emissions they told me to run the street tune to be safe because they may be off in the performance tune as well. Keep in mind, you can turn them off or on in any tune but I think by default they are off in the race tune.

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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