plug gap

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06-25-2014, 09:04 AM

jjntj2003

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plug gap

Just picked up a set of the motorcraft sp-534 plugs and the tech said they were pregapped but what is everyone gapping theirs at? .30? Need answers pretty quick as I'm fixing to change them.

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06-25-2014, 09:40 AM

Bluejay

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Is this for an EB? If so, I think it's 35

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06-25-2014, 10:30 AM

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Mine seem to run best at .035". I had them down to .032"ish for a while and my mileage seemed to drop a little bit. The factory gap at ~50k was between.033"-.040". Changing them smoothed the idle out considerably.

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06-25-2014, 10:51 AM

KingRanchCoy

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Quote:

Originally Posted by jjntj2003

Just picked up a set of the motorcraft sp-534 plugs and the tech said they were pregapped but what is everyone gapping theirs at? .30? Need answers pretty quick as I'm fixing to change them.

Most people that recommend gaping them to .030 on a Eb are running a tune.. If you are stock i would recommend the .035

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