( .054 inch ) according to fordparts.com
The spark plug gap for the 5.0 L - V8 engine - in a 1999 Ford Explorer is ( .052 - .056 inch )
The spark plugs on a Ford Explorer are replaced by first disconnecting the battery. Remove the spark plug using a spark plug socket. Replace with the factory recommended spark plug.
The spark plug gap for a 1998 Ford Explorer (V6 and V8 engines) is .054"
The 1999 Kia spark plug gap setting is .035. Most spark plugs will be pre-gapped by the spark plug manufacturer.
.054
the specified gap for a 99 for explorer is (.054). If you set it a little closer the spark plug will last longer. exp.(.045).
What is the spark plug gap for a 1999 Nissan Quest w/ 3.3 engine?
spark module is bad
The spark plug gap on a 1999 Suzuki Intruder 1500 is 0.035 inch. This is a common spark plug gap size for motorcycles.
On a 2003 Explorer, there is no distributor or coil pack. Each spark plug has it's own coil pack as part of the spark plug boot.
On a 1996 Ford Explorer , 4.0 liter V6 engine : The spark plugs are installed in the engine cylinder heads ( you can see where the spark plug wires connect to the spark plugs ) firewall #3 - #6 #2 - #5 #1 - #4 front of vehicle
.052 to .056 inch - my spark plug gapper has a .054 inch