Ford Mustang Forum - View Single Post - Air/fuel ratio spiking in a new Mustang, sometimes losing power.
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post #16 of (permalink) Old 02-05-2013
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Joined: Oct 2012
Location: Howell
Posts: 88
Originally Posted by JeffCO. Coyote View Post
I looked the other day at my afr gauge (premium) and I ran my car through the gears. It never seemed to drop lower than 13.8-14.1. Is this possibly because my car was built dec 17th supposedly after the pcm update?
Under heavy throttle, it should drop into the 12's. if it didn't, you were probably not on the gas hard enough.

2013 Track Pack GT
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