Engine Ignition

ENGINE IGNITION

The electronic Ignition (EI) system consists of the following components:
- coil on plug
- spark plugs
- crankshaft position (CKP) sensor
- camshaft position (CMP) sensor

The crankshaft position (CKP) sensor:
- is a variable reluctance sensor.
- is mounted on the engine front cover.
- is triggered by a 36-minus-1 tooth trigger wheel located on the crankshaft pulley and damper.
- provides ignition timing and crankshaft speed (rpm) to the powertrain control module (PCM).

Refer to Computers and Control Systems, for removal and installation of the CKP sensor.

The coil on plug:
- is controlled by the PCM.
- fires two spark plugs simultaneously.

The spark plug:
- ignites the fuel and air mixture.