The spark plug gap is .054 inch Another fellow did a compression test on his 1991 or ? and his lowest cylinder was 145 PSI and his highest cylinder was 150 PSI It is the difference between the lowest and highest cylinders, so his engine was in good shape.
( 8 spark plugs ) for your 4.6 liter V8 engine in a 2002 Ford Explorer
Check for: fuel, spark, compression
For a 2001 Ford Explorer Sport Trac : There are ( 6 spark plugs ) for your 4.0 liter V6 engine
For a 1997 Ford Explorer 4.0 liter V6 engine ( EFI and SOHC versions ) ( There are 6 spark plugs )
It is getting fuel/spark/ compression?
( 6 ) for the 4.0 liter V6 engine and ( 8 ) for the 5.0 liter V8 engine
( 6 ) for the 4.0 liter V6 engine ( 8 ) for the 4.6 liter V8 engine
( .054 inch ) for the 4.0 liter OHV , 4.0 liter SOHC , and the 5.0 liter V8 engine
According to one of Fords websites : For a 1991 Ford Explorer , 4.0 liter V6 engine : ( the spark plugs are gapped at .054 inch )
The spark plugs are threaded into the cylinder heads ( there are spark plug wires from the coil ( or 2 coils in the case of the 5.0 liter V8 ) going to each spark plug On the 4.0 liter V6 engine : firewall 3 - 6 2 - 5 1 - 4 front of 1996 Ford Explorer On the 5.0 liter V8 engine : firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of 1996 Ford Explorer
No you don't need compression to get spark but you do need compression for it to run.
( 6 spark plugs ) for your 4.0 liter SOHC , V6 engine