Ignition system. Distributor-5.2L/5.9L v-8 engine

Ignition system

DESCRIPTION

Two different ignition systems are used. One type of system is for the 5.2L/5.9L V-8 engine. The other is for the 4.7L V-8 engine.

The ignition systems used on 5.2L/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.

OPERATION

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 (5.2L/5.9L engines)
• Distributor (contains rotor and camshaft position sensor) (5.2L/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.

Distributor-5.2L/5.9L v-8 engine

DESCRIPTION

The 5.2L/5.9L V-8 engine is equipped with a camshaft driven mechanical distributor (Fig. 1) containing a shaft driven distributor rotor. All distributors are equipped with an internal camshaft position (fuel sync) sensor (Fig. 1).

Fig. 1 Distributor and Camshaft Position Sensor

1 - SYNC SIGNAL GENERATOR

2 - CAMSHAFT POSITION SENSOR

3 - PULSE RING

4 - DISTRIBUTOR ASSEMBLY

OPERATION

The camshaft position sensor provides fuel injection synchronization and cylinder identification.

The distributor does not have built in centrifugal or vacuum assisted advance. Base ignition timing and all timing advance is controlled by the Powertrain Control Module (PCM). Because ignition timing is controlled by the PCM, base ignition timing is not adjustable.

The distributor is held to the engine in the conventional method using a holddown clamp and bolt.

Although the distributor can be rotated, it will have no effect on ignition timing.

All distributors contain an internal oil seal that prevents oil from entering the distributor housing.

The seal is not serviceable.