help please
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help please
ok so I have a 2002 f150 5.4L 4x4 7700 and she was misfiring bad the other day I changed coil pack 1 and 4 because thats what my codes where reading and i changed all of my spark plugs just because the check engine light went away for a little over a day and boy was she running good she had a little hikup with a miss fire but it quickly fixed itself but later now my check engine light is back on and is miss firing again and this time it isnt fixing itself what is going on with my truck? please help
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