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1998 Ford F-150 Question: how to determine which coil pack is bad.

 

Question

bellpine, Des Moines, IA, July 28, 2013, 13:51
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i know one is bad but not sure which one ???

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  • Answer #1

    July 28, 2013, 14:02
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     Master

    Which engine?

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    bellpine, July 28, 2013, 14:22
     Rookie

    5.4l

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    pushrod, July 28, 2013, 14:24
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     Master

    Replace all coils. You will be glad you did, if you plan to keep the truck! Scanner can find misfire, IF you want to replace just one.

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  • Answer #2

    Ron Haugen from Westside Auto Pros, July 29, 2013, 11:22
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     Technician

    I would strongly recommend a set of eight as well as goo with an OEM or high quality coil. You could try disconnecting them one at a time until you find the one that does not effect how it runs and know that is the failed one as well.

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