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Changing Spark Plugs


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Can some one help i have an 1999 cadillac sts i need to know the right spark plugs gap size i have been told .050 to .055 and also .060

I had it set to .055 And it run ok I redid it to .050 and the car will stop running some times not all the time.

can some one tell the right gap size.


Welcome to the forum. The correct gap is 0.050".

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There will be an emissions sticker under the hood - possibly on the inside front edge of the hood that will have the proper plug gap.

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