Engine Ignition
WARNING: This page is about a different car, the 2007 Lincoln MKX and 2007 Ford Edge. 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 ignition system. The coil-on-plug ignition system consists of:
- two camshaft position (CMP) sensors.
- crankshaft position (CKP) sensor.
- six ignition coil-on-plugs.
- six spark plugs.
The CMP sensors:
- are variable reluctance sensors.
- are mounted in the rear of the cylinder head.
- are triggered by a 3-plus-1 timing wheel on each intake camshaft.
- provides camshaft rotational location information to the PCM.
The CKP sensor:
- is a variable reluctance sensor.
- is triggered by a 36-minus-1 tooth trigger wheel mounted on the crankshaft, at the rear of the engine.
- provides base timing and crankshaft speed (rpm) to the PCM.
The 6 separate ignition coil-on-plugs:
- convert battery energy to high-energy output as controlled by the PCM.
- transfer the high-energy output to the spark plugs.
- are connected directly to each spark plug.
- have replaceable coil seals.
The 6 spark plugs:
- transfer high-energy coil output into a spark which ignites the fuel and air mixture.
- originally equipped on the vehicle have a platinum-enhanced fine wire electrode for long life.