Engine Ignition

WARNING: This page is about a different car, the 2004 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.

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 COP Ignition System
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.
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.