Engine Ignition

The electronic ignition (EI) system is a coil-on-plug (COP) ignition system. The COP ignition system consists of the following components:

• Crankshaft position (CKP) sensor.
• Camshaft position (CMP) sensor.
• Ignition coils.
• Spark plugs.
  Fig 1: Identifying Crankshaft Position Sensor

  Courtesy of FORD MOTOR CO.

The crankshaft position sensor:

• Is a variable reluctance sensors.
• Is mounted to the engine sump body.
• Is triggered by a 36-minus-1 tooth trigger wheel mounted on the crankshaft.
• Provides base timing and crankshaft speed (RPM) to the powertrain control module (PCM).
  Fig 2: Identifying Camshaft Position Sensors

  Courtesy of FORD MOTOR CO.

The two camshaft position sensors:

• Are mounted on the rear of each cylinder head.
• Send the powertrain control module (PCM) a signal indicating camshaft position used for fuel and spark synchronization.
  Fig 3: Identifying Ignition Coils

  Courtesy of FORD MOTOR CO.

The eight separate ignition coils:

• Convert low voltage signals from the PCM to high voltage pulses.
• Produce the high voltage pulses for the spark plugs.
• Are connected directly to each spark plug.

The spark plugs:

• Convert a high voltage pulse into a spark which ignites the fuel and air mixture.
• Originally installed on the vehicle have a platinum-enhanced active electrode for long life.