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Was wondering what the gap is on the spark plugs on 1999 f150

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Why do you want to know you can't gap plugs anymore as that will break the modern plugs their pergapped and if you try to change the gap you'll break the plug so don't try it. They don't sell plugs that are gapped wrong and they break if you try to change the gap anyway. If the emissions sticker does'nt have a gap listed ( it probly doesn't ) the plugs that fit the truck can't be changed except by wear. 50 thou or more you might be able to measure the difference between a new plug and the ones in the truck. If your going to the troble of removing any put in new ones and new wires too.

Posted on Aug 23, 2010

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