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.
The crankshaft position sensor:
- Is a variable reluctance sensors.
- Is mounted to the engine sump body.
- 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).
The two camshaft position sensors:
- Are mounted on the rear of each cylinder head.
- Send the powertrain control module (PCM) a signal indicating camshaft position used for fuel and spark synchronization.
The eight separate ignition coils:
- Convert low voltage signals from the PCM 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 installed on the vehicle have a platinum-enhanced active electrode for long life.