Question about 2002 Ford F150 Regular Cab

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F150 4x4 Engine stared missing after replacing spark plugs !

I have a 1998 F150 4x4, last week on my way home my engine started missing with the check engine light soon to follow. My Kragen diagnostic computer said cylinder 8 miss-fire. When I went to pull the plug I noticed it was just more than hand tight. the plug was burnt off at the end. I then replaced all the plugs one at a time making sure each one was gapped correctly and tight. Now when I start my truck I have a miss that is more recognizable when the truck is in gear and under load. My check engine light will not come back on, and my diagnostic computer is not showing any errors. Any ideas? Thank You!

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  • Jerry Koski
    Jerry Koski May 11, 2010

    We sometimes make the mistake of getting the wrench in a bind when tightening the plugs and can crack the porcelin which can make that cylinder misfire. also when you removed the wires if they are old you might have pulled one in two and they might need replaced also.. just a thought jerry holler if you need more.



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Im assuming this is a coil over plug setup so it has no plug wires? if your plug was burnt off sounds like it was lean...mabe you have a week injector on number 8. also check the the plug on the coil and make sure it is in tight. checking the porceline on the plug would b a good idea too, only takes a hairline crack to make it not work

Posted on Feb 07, 2009


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