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| F Series Forum covers questions and discussions regarding Ford F-150, Ford F-250, Ford F-350, Ford F-450, Ford F-550, Ford F-650, and Ford F-750. |
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#1
07-28-2007, 01:34 PM
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1998 Ford F150 XLT 4.6
My truck started missing and also backfiring a few weeks ago. Replaced sparkplugs and wires. It quit backfiring but is still missing. Replaced the fuel injectors last weekend but it still misses.Does anyone know if a bad ignition coil could cause this problem?
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#2
08-12-2007, 12:49 PM
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Re: 1998 Ford F150 XLT 4.6
Check engine light on? If so, what codes are given when a scan tool is used.
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#3
08-12-2007, 03:07 PM
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Re: 1998 Ford F150 XLT 4.6
My 1997 had a coil for each sparkplug if this is the case a bad coil will definately cause a miss. If you check codes it should tell you which cylinder is misfiring. Auto Zone and Advance do this as a free service. I assume they will you to buy a part from them.
A bad pressure regulator can cause a miss by causing some cylinders not to get a proper mixture.
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#4
08-12-2007, 03:19 PM
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Re: 1998 Ford F150 XLT 4.6
also make sure your gap in your spark plugs are correct for the vehicle
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#5
08-12-2007, 04:23 PM
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Re: 1998 Ford F150 XLT 4.6
Do a compression test on the cylinders also,it could be a "dead cylinder" and a compression test will confirm that.
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