General

Eight separate ignition coils:
^ are controlled by the Powertrain Control Module (PCM).
^ are mounted directly above each spark plug.
^ are controlled by the powertrain control module for correct firing sequence.

The spark plug:
^ changes the high voltage pulse into a spark which ignites the fuel and air mixture.
^ originally equipped on the vehicle has a platinum-enhanced active electrode for long life.

Crankshaft Position (CKP) sensor:

NOTE: Initial engine ignition timing is set at 10 degrees ± 2 degrees Before Top Dead Center (BTDC) and is not adjustable. For further information regarding the diagnosis of this system, please refer to Computers and Control Systems; Testing and Inspection.

Testing and Inspection

^ is a variable reluctance sensor triggered by a 36-minus-1 tooth trigger pulse wheel located on the crankshaft inside the engine front cover.

The sine wave type signal generated from the crankshaft position sensor provides two types of information:
^ position of the crankshaft in 10 degree increments
^ the crankshaft speed (rpm)

For additional information, refer to Computers and Control Systems.