Ford Mustang Forum - View Single Post - Air/fuel ratio spiking in a new Mustang, sometimes losing power.
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post #17 of (permalink) Old 02-05-2013
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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?
Believe it or not this is normal. If you do a search for my past posts you will see that I already went through this paranoia. The best explanation so far came from [email protected] I'm not going to go through reciting what Shawn have posted through numerous posts on svtp forum but surprisingly this seem to be a norm so far. It doesn't seem to affect all 2013 mustangs either because some guys see exactly what I thought I should see which is low 12's on wot. I already went through my dealer regarding stoich on wot and they said everything is all within spec and nothing to worry about. However, just to note, ford racing pro cal and my current diablo all have brought my AFR to what I'm used to, which is low 12's on wot.

2013 Deep Impact Blue Metallic MT-82 401a
DiabloSport in tune - AirAid CAI - SVT GT500 AB - Ford Racing P springs - Forgestar F14 - Roush rear/side splitters - Stillen chin splitter - CS Fascia conversion - LED fog delete - 2 much 2 list.... Official mod addict: D
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