IGNITION SYSTEM
TABLE OF CONTENTS
page page
DESCRIPTION AND OPERATION
IGNITION SYSTEM ........................1
DISTRIBUTOR—5.2L/5.9L V-8 ENGINE........1
SPARK PLUGS ...........................2
SPARK PLUG CABLES .....................2
IGNITION COIL (EXCEPT 4.7L ENGINE)........2
IGNITION COIL—4.7L ENGINE...............3
CRANKSHAFT POSITION SENSOR—5.2/5.9L
V-8 ENGINE ............................3
CRANKSHAFT POSITION SENSOR—4.7L
ENGINE ...............................3
CAMSHAFT POSITION SENSOR..............4
CAMSHAFT POSITION SENSOR—4.7L
ENGINE ...............................5
IGNITION SWITCH AND KEY LOCK
CYLINDER .............................5
DIAGNOSIS AND TESTING
DISTRIBUTOR CAP........................6
DISTRIBUTOR ROTOR.....................6
SPARK PLUG CABLES .....................7
SPARK PLUG CONDITIONS .................8
IGNITION SWITCH AND KEY LOCK
CYLINDER ............................10
REMOVAL AND INSTALLATION
SPARK PLUG CABLES ....................11
SPARK PLUGS ..........................11
IGNITION COIL—3.9/5.2/5.9L ENGINES ......12
IGNITION COIL—4.7L ENGINE..............13
CRANKSHAFT POSITION SENSOR—3.9/5.2/
5.9L ENGINES.........................14
CRANKSHAFT POSITION SENSOR—4.7L V-8
ENGINE ..............................14
CAMSHAFT POSITION SENSOR.............15
CAMSHAFT POSITION SENSOR—4.7L
ENGINE ..............................15
DISTRIBUTORS—3.9/5.2/5.9L ENGINES ......16
IGNITION SWITCH AND KEY CYLINDER ......17
COLUMN SHIFT INTERLOCK ...............21
SPECIFICATIONS
IGNITION TIMING........................21
ENGINE FIRING ORDER—5.2L/5.9L V-8
ENGINES .............................21
ENGINE FIRING ORDER—4.7L V-8 ENGINE ...21
SPARK PLUGS ..........................22
SPARK PLUG CABLE RESISTANCE ..........22
IGNITION COIL RESISTANCE—EXCEPT 4.7L
ENGINE ..............................22
IGNITION COIL RESISTANCE—4.7L V-8
ENGINE ..............................22
TORQUE CHART.........................22
DESCRIPTION AND OPERATION
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 distribu-
tor 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 Sen-
sors
• 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 cam-
shaft driven mechanical distributor (Fig. 1) contain-
ing a shaft driven distributor rotor. All distributors
are equipped with an internal camshaft position (fuel
sync) sensor (Fig. 1).
DN IGNITION SYSTEM 8D - 1
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