spark plug gap

V8 4.6L is .050 (In thousandths of an inch)

Here is a guid to help you change them out correctly.

https://www.2carpros.com/articles/how-to-change-spark-plugs

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I have a spark plug that is misfiring on the car. I plan to drive it about 15 miles to a dealer for repair, will this cause a problem? Dealer says ot will effect preformance and fuel consumption.

[quote:45a4a05560="clcljw"]Engine Performance problem
1999 Cadillac Seville V8 Front Wheel Drive Automatic 89000 miles
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I have a spark plug that is misfiring on the car. I plan to drive it about 15 miles to a dealer for repair, will this cause a problem? Dealer says ot will effect preformance and fuel consumption.[/quote:45a4a05560]

you will be ok