Expedition 4WD V8-4.6L SOHC VIN W (1999)
Spark Plug: Description and Operation
The spark plug.
^
change the high voltage pulse from the ignition coil into a spark which ignites the fuel and air mixture.
^
are different for the LH and RH side of the engine.
^
originally equipped on the vehicle have a Platinum-enhanced electrode for long life.