Engine Ignition

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).

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.

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.