Navigator 4WD V8-5.4L VIN 5 (2006)
Ignition Coil: Description and Operation
Engine Ignition
ENGINE IGNITION
The electronic ignition system is a coil-on-plug ignition system. The coil-on-plug ignition system consists of the following components:
-
Crankshaft position (CKP) sensor
-
Ignition coils
-
Spark plugs
The CKP sensor:
-
is a variable reluctance sensor.
-
is triggered by a 36-minus-1 tooth sensor ring mounted on the crankshaft.
-
provides base timing and crankshaft speed (rpm) to the powertrain control module (PCM).
The 8 separate ignition coils:
-
change low voltage signals from the PCM to high voltage pulses.
-
produce the high voltage pulses to the spark plugs.
-
are connected directly to each spark plug.
The spark plugs:
-
change high voltage pulses into a spark which ignites the fuel and air mixture.
-
originally equipped on the vehicle have a platinum-enhanced active electrode for long life.