Ignition System: Description and Operation

IGNITION CONTROL
Two different ignition Systems are used. One type of system is for the 3.9L V-6 engine and the 5.9L V-8 engine. The other is for the 4.7L V-8 engine.

The ignition systems used on 3.9L V-6 and 5.9L V-8 engines are basically identical using a conventional distributor and remotely mounted coil. The 4.7L V-8 engine does not use a distributor and has 8 separate coils.

The ignition system is controlled by the Powertrain Control Module (PCM) on all engines.

The ignition system consists of:
- Spark Plugs
- Ignition Coil(s)
- Secondary Ignition Cables (3.9L/5.9L engines)
- Distributor (contains rotor and camshaft position sensor) (3.9L/5.9L engines)
- Powertrain Control Module (PCM)
- Crankshaft Position and Camshaft Position Sensors
- The MAP TPS, IAC and ECT also have an effect on the control of the ignition system.