Ford Mustang Forum - View Single Post - Air/fuel ratio spiking in a new Mustang, sometimes losing power.
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post #3 of (permalink) Old 02-04-2013
Grimace427's Avatar
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Originally Posted by sloppymax View Post
Have you pulled the code? Each instance that I have seen a blinking CEL, it was a misfire, which would explain the power loss.

I agree, and the change in A/F ratio could be the result of an issue rather than the cause. The commanded A/F changes constantly with load and other factors so unless you are datalogging the car for tuning purposes there isn't really a reason to watch it.

If your check engine light comes on your only option is to have it properly diagnosed at the dealer because we can't do anything for you.
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