they run parallel with the valve covers 4 on each side of the engine. they are under the COP's which are little black plastic cylinders. hard to remove because of the fuel injector rails.
Ford uses Motorcraft Spark plugs on all there vehicles.
In a 2002 Ford Expedition : For the 4.6 or 5.4 liter V8 engines : (there are 8 spark plugs )
( 8 spark plugs ) for your 4.6 liter V8 engine in a 2002 Ford Explorer
4
no 5.4
On a 2002 Ford Ranger : Check the Vehicle Emissions Control Information ( VECI ) decal in the front of your engine compartment . It will show the type of spark plugs used and the spark plug gap
( 4 ) for the 2002 Ford Ranger 2.3 L - DOHC engine
( 6 spark plugs ) for your 4.0 liter SOHC , V6 engine
fireing order ford 1994 e-250 econoline
http://www.ford-trucks.com/article/idx/0/100/article/How_To_Change_Spark_Plugs_on_46__54_Liter_F150s.html
.054"
MotorCraft