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f150 4.2l p0302 code only

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  #1  
Old 06-02-2012, 09:53 AM
scotttss's Avatar
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Angry f150 4.2l p0302 code only

replaced coil pack plugs wires all from ford still missfire on cyl 2 only drives fine when od is off , but when shifts to od missfire is more pressent and then it is windy out side.. HELP
 
  #2  
Old 06-04-2012, 05:11 PM
bluewind's Avatar
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Location: Iowa
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But clearing the code doesn't fix the problem.

The misfire may not be caused by a bad ignition part it could also be a fuel injector, or a compression issue or deposits on the valves and the head and so on.
I would listen to the fuel injectors with a stethoscope or something. I would run a fuel system cleaner like "Techron" and I would look at the Throttle body and the EGR system.

Good luck
 
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