Engine Ignition

Fig 1: Identifying Engine Ignition Component Locations

Courtesy of FORD MOTOR CO.

The crankshaft position sensor:

• Is a variable reluctance sensor.
• Is triggered by a 36-minus-1 tooth trigger wheel mounted on the crankshaft (6303).
• Provides base timing and crankshaft speed (RPM) to the powertrain control module (PCM) (12A650). Refer to ELECTRONIC ENGINE CONTROLS for removal and installation of the crankshaft position sensor.
Fig 2: Identifying Crankshaft Position Sensor
Courtesy of FORD MOTOR CO.

The eight separate ignition coils:

• Change low voltage signals from the powertrain control module to high voltage pulses.
• Produce the high voltage pulses to the spark plugs.
• Are connected directly to each spark plug.
Fig 3: Identifying Ignition Coils
Courtesy of FORD MOTOR CO.

The spark plugs:

• Change a high voltage pulse into a spark which ignites the fuel and air mixture.
• Originally equipped on the vehicle have a platinum-enhanced electrode for long life.
Fig 4: Identifying Spark Plug
Courtesy of FORD MOTOR CO.