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WHATS THE SPARK PLUG GAP

(1999 Ford F-150)
in Winnemucca, NV on May 17, 2015
WHAT IS THE MOST PROPER SPARK PLUG GAP FOR THE 4.2 L V-6
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Popular Answer
on May 17, 2015
.054!gap is not adjustable on certain brands,if they are .052-.056 they are good to go!put motorcraft plugs in it!!part#SP-504 platinum finewire.don't try to gap em,unless you have the wire gauge!or you will have bad day.part#25026=$3.00
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