The gap is- .060 inch. Use a gap guage or feeler guages.
3.8 liter V-6 : .060"
spark gap 1984 regal 3.8
.060 is the typical spark plug gap for your engine.
first you need to state what liter the engine is.
The spark plug gap for a 2000 Buick Regal should be set at .060 inches. New spark plugs may be purchased at an auto parts store and will be preset.
0.060 inches
The Spark Plug Gap.060 (In thousandths of an inch)
The spark plugs are all identical so are interchangeable
Spark plug diagram for '98 buck regal
Assuming there is not a major internal problem you need fuel, spark and air to get an engine started. So, from what you described I'd be looking at a problem with getting spark, probably from the ignition coil.
That would depend on which engine you have in your 2003 Ford Excursion : The 7.3 liter diesel engine doesn't use any spark plugs The 5.4 liter V8 engine has ( 8 spark plugs ) The 6.8 liter V10 engine has ( 10 spark plugs )
On a Ford Excursion ( if it has a gasoline engine ) ( the 5.4 liter V8 engine has 8 spark plugs ) ( the 6.8 liter V10 engine has 10 spark plugs )