05 f250 5.4 missfire
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Junior Member
Joined: Jan 2013
Posts: 2
05 f250 5.4 missfire
I have a 5.4 keeps poping codes for cyl missfire i replaced all the plugs with factory plugs. i have replacde 4 coils 2,3,5,8cyl. it keeps poping these cyl missfire codes always the same ones. any idea what else i can check?
Senior Member
Joined: Jun 2010
Posts: 16,558
A quickie.
Try unplugging the alternator plug and driving it. If the codes don't return, replace the alt.
Something else to consider,
Replace the remaining coils !
Check for any water intrusion where the plug connects to the PCM.
Try unplugging the alternator plug and driving it. If the codes don't return, replace the alt.
Something else to consider,
Replace the remaining coils !
Check for any water intrusion where the plug connects to the PCM.
Last edited by hanky; Jan 19, 2013 at 02:40 PM.
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