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 Coil-On-Plug Ignition System

Courtesy of FORD MOTOR CO.

The crankshaft position sensor:

• is a variable reluctance sensor.
• is triggered by a 36-minus-l tooth trigger wheel mounted on the crankshaft.
• provides base timing and crankshaft speed (rpm) to the powertrain control module (PCM).

Fig 2: Identifying Crankshaft Position Sensor

Courtesy of FORD MOTOR CO.

The camshaft position sensor:

• sends the powertrain control module (PCM) a signal indicating camshaft position used for fuel and spark synchronization.

Fig 3: Identifying Camshaft Position Sensor

Courtesy of FORD MOTOR CO.

The 6 separate ignition coils:

• convert low voltage signals from the powertrain control module 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 equipped on the vehicle have a platinum-enhanced active electrode for long life.