02 ranger p0301 - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 04-05-2008
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02 ranger p0301

Check engine light comes and goes, also flashes, code is p0301 cylinder 1 misfire, I have changed plugs and wires, also taken it to muffler shop thought cat was bad they say its fine. the truck idles rough and shakes while in drive and stopped. also on a cold start it feels as if its going to stall but never does. I have used BG fuel injection cleaner and still same issue. not sure what do to other than take to ford dealer. any help much appreciated.
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Old 04-05-2008
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Other possibles - vacuum leak on #1 runner, injector or valve problem on #1.
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Old 04-07-2008
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coil pack

changed the coil pack now im back to normal, other than i got another code of p0171 system too lean bank 1, whatever that means..
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