Engine Ignition

ENGINE IGNITION

The electronic ignition (EI) system consists of the following components:
- ignition coil
- spark plugs
- spark plug wires
- crankshaft position (CKP) 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 base 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 ignition coil:
- is controlled by the PCM.
- fires two spark plugs simultaneously.

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

The spark plug wire:
- carries high voltage pulses from the ignition coil to the spark plugs.