Engine Ignition

The ignition system consists of the following:
^ ignition coil
^ ignition wire and bracket
^ spark plugs
^ Crankshaft Position CKP sensor

The ignition system is:
^ an Electronic Distributorless Ignition System (EDIS) controlled by an Electronic Engine Control (EEC) integrated into the Powertrain Control Module (PCM).
^ set at 10 degrees Before Top Dead Center (BTDC) for base timing and it is not adjustable.

The ignition coil:
^ changes low voltage pulses from the powertrain control module to high voltage pulses.
^ sends high voltage pulses to the spark plugs through the spark plug wires.
^ has three transformers.
^ has six spark plug wires, one to each end of each transformer.
^ is mounted on top of the intake manifold.

Spark plug wires carry high voltage pulses from the ignition coil to the spark plugs.

The spark plugs:
^ change high voltage pulses to spark at gap which ignites fuel and air mixture.
^ have a platinum-enhanced active electrode for long life. The active electrode is different for LH and RH sides.

Original spark plugs on the RH side (cylinders 1,2 and 3) spark plugs are AGSF-34EG.

Original spark plugs on the LH side (cylinders 4, 5 and 6) are AGSF-34E.

Replacement spark plugs are AGSF-34EE; the electrodes are platinum-enhanced and can replace either a RH or LH spark plug.

The Crankshaft Position (CKP) sensor:
^ is a variable-reluctance sensor.
^ senses a missing tooth on crankshaft damper pulse ring.
^ generates a crankshaft position signal which is sent to the powertrain control module. The powertrain control module counts this signal for engine rpm and spark advance.

For removal and installation of the crankshaft position sensor, refer to Computers and Control Systems.