2002 Ranger- Cylinder 6 missfire-PLEASE HELP - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 09-29-2013
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2002 Ranger- Cylinder 6 missfire-PLEASE HELP

CEL came on last week. Truck is running very rough, shakes at stop lights, hesitates when taking off.

Pulled a P0306 code off of it yesterday. Changed spark plug, it was white. Cleared the code, now it's back on after driving 5 miles and running rough again. We have changed the Ignition Coils & Spark plus (not the wires yet).

I'm trying to sell it and have no idea where to go next with it.

Any help or suggestions would be greatly appreciated.
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Old 09-29-2013
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Strange. When I had a misfire code, I found the porcelain was cracked on that plug. And I'm talking like a hairline crack that I really had to look hard to see. I'm thinking I must have cracked it putting it in.
What plugs did you put in it? Everyone says put the autolite plugs in it, but I found those to be complete junk. I put a set of motorcrafts back in and it ran great with no more problems.
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Old 09-29-2013
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It's a mystery lol. I've read so many forums that people have the same problem and no one seems to know the issue.

I used Autolite for the spark plugs. I just replaced the spark plug wire , cleared the code and took it for a test drive. Light stayed off and it seems to be running 100% better. I guess i'll have to see if it last.

Thanks for the help.
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Old 09-29-2013
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Hopefully that does it.
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Old 10-01-2013
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Thanks for share the post with us.............
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