spark plug gap setting for 1993 xjs 4.0 6 cylinder
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From: Florida
spark plug gap setting for 1993 xjs 4.0 6 cylinder
What are the correct settings for the gap on the spark plugs on a 1993 XJS 4.0 6 cylinder. The plugs come preset at .040" and the manual calls for .025" setting which would be the correct setting and does the setting change the performance greatly.