The ones for the 5.4 are supposed to be pre-gapped already and not to be adjusted, well if you get the Motorcraft plugs anyways.
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Thread: Misfiring
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04-07-2014, 11:57 PM #61Senior Member
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04-08-2014, 08:10 PM #62Banned
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I think the key is "supposed" to be. Sometimes they are way off. If you are interested and want to know more, gap matters.
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04-08-2014, 08:39 PM #63Senior Member
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Checked mine all good out if box.
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04-08-2014, 08:52 PM #64Senior Member
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The Motorcraft plugs I got for my 4.6 were all within spec except for 1 which was a little too big. I fixed that though. The 5.4 ones are a little harder to adjust and are usually on spec.
Last edited by RhinoZ24; 04-09-2014 at 03:16 PM.
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04-09-2014, 02:31 PM #65Senior Member
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As longs as one on my sp515 wasnt dropped on end by someone they would be good.
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