Engine Ignition

ENGINE IGNITION

The electronic ignition (EI) system is a coil-on-plug (COP) ignition system. The COP ignition system consists of the:
- eight ignition coil-on-plugs.
- eight spark plugs.
- crankshaft position (CKP) sensor.

The CKP sensor:
- is a variable reluctance sensor.
- 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). Refer to Computers and Control Systems.

The 8 separate ignition coil-on-plugs:
- change low voltage to high voltage pulses based on PCM signals.
- produce the high voltage pulses to the spark plugs.
- are connected directly to each spark plug.

The 8 spark plugs:
- change a high voltage pulse into a spark, which ignites the fuel and air mixture.
- originally equipped on the vehicle have a platinum electrode for long life.