Question about 1988 Ford F 150

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98 f150 cylinder 4 misfire(4.6)- replaced plug- but wire tip in valve cvr is corroded- plug was fouled(only 6 months ago replaced wires plugs and pwr packs/aka coils- lotsa fire but still missing- suggestions????

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  • Anonymous Jan 08, 2009

    I have a 1998 f150 with a 4.6 that is miss firing ? code p0301

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It mit be out of time try advance your disbutor

Posted on Jan 17, 2009

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Hi Roger:
I'd start by removing the spark plug and having a good look at the tip. It should tell you a lot about what is going on. Is it oil fouled, burnt, eroded?
Then put in a fresh plug and run it for a while. Has the problem gone away? What is the condition of the spark plug lead wire? Try looking at the wires with the engine running in the dark. Can you see sparks? If so, it may be time to replace the spark plug leads.
Depending on the miles on the engine, the problem could be as simple as, it's time to change the spark plugs, to the first indication of a bad head gasket or worn piston rings.
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Your misfire can be cause by couple of things but the cheapest way that you can try to fix your car is to do a tune up by replacing:
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