2012 f150 5.0L
Posted in the Ford Motor Forum
#1 Jan 29, 2018
Hello, i own a 2012 ford f150 5.0L V8 with 100xxx miles on it. And its misfiring on cylinder 7 heavily in idle. Swapped spark plugs, coil packs, checked electrical and its still occurring. Did a compression test and the 7th cylinder performs when you accelerate. Its in IDLE when its bad. I tried pulling the O2 sensors cause i thought CAT could be clogged and it still occurred. Im either thinking Crank position sensor or CAM positioning sensor or a burnt valve. Kind of lost...any ideas or common probelms?
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