Engine Ignition

ENGINE IGNITION

Coil Terminal-To-Cylinder Relationship:

The electronic ignition (EI) system consists of the:
- crankshaft position sensor.
- ignition coil.
- spark plug wires.
- spark plugs.

The crankshaft position 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 PCM.

Refer to Computers and Control Systems.

The ignition coil:
- is controlled by the PCM.
- fires 2 spark plugs simultaneously.
- is mounted on the RH valve cover.

The spark plug wires:
- carry high voltage pulses from the ignition coil to the spark plugs.

The spark plugs:
- ignite the fuel and air mixture.
- are nickel enhanced for long life.