Engine Ignition

The electronic ignition (EI) system for the 3.0L Duratec engine consists of the following components:

• Crankshaft position (CKP) sensor
• Camshaft position (CMP) sensor
• 6 ignition coil-on-plugs
• 6 spark plugs

The CKP sensor:

• is a variable reluctance sensor.
• is mounted in the front cover.
• is triggered by a 36-minus-1 tooth trigger wheel located behind the front cover.
• provides base timing and crankshaft speed (rpm) to the powertrain control module (PCM). For additional information, refer to ELECTRONIC ENGINE CONTROLS article.

The CMP sensor:

• is a variable reluctance sensor.
• is mounted in the front cover.
• is triggered by the high point mark on the LH exhaust camshaft.
• provides camshaft rotational location information to the PCM. For additional information, refer to ELECTRONIC ENGINE CONTROLS article.

The 6 ignition coil-on-plugs:

• are connected directly to each spark plug.
• change low voltage signals from the PCM to high voltage pulses.
• supply the high voltage pulses to the spark plugs.

The 6 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.