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AFR jumping around and rough idle

loucas-2021

Well-Known Member
Joined
May 14, 2023
Threads
26
Messages
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Location
Tamarac, FL
First Name
Louis
Vehicle(s)
2021 Mustang GT PP Grabber Yellow
Hello everyone:

I was out driving earlier today. I live in south Fl. and today was hot. I usually drive with the windows down and no AC, but today was too hot so I turned on the AC. As soon as I did that, my AFR started jumping around and I started getting a rough idle and almost felt like it was going to stall. Before my drive I filled up my tank with 93 octane gas from WaWa. Could this be related to bad gas? What should I look for? This has happened before several months ago and then it went away and just today it resurfaced. Any help/input much appreciated. My battery was showing 12.8 volts at some points, but it would come back to 14 when I got off the throttle. I have an upgraded throttle body and CAI.
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