IGNITION CONTROL
TABLE OF CONTENTS
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IGNITION CONTROL
DESCRIPTION - IGNITION SYSTEM ..........1
OPERATION - IGNITION SYSTEM ...........1
SPECIFICATIONS
TORQUE .............................1
SPARK PLUG .........................2
CABLES RESISTANCE CHART ............2
IGNITION COIL RESISTANCE - 8.3L ........2
8.3L - FIRING ORDER ...................2
CAMSHAFT POSITION SENSOR
OPERATION - 8.3L .......................3
REMOVAL
REPLACING WITH NEW SENSOR .........3
REPLACING OLD SENSOR WITH ORIGINAL . 4
INSTALLATION
INSTALLATION - WITH NEW SENSOR ......4
REPLACING OLD SENSOR WITH ORIGINAL . 4
IGNITION COIL
OPERATION ............................5
REMOVAL .............................5
INSTALLATION ..........................6
SPARK PLUG
DESCRIPTION ..........................7
OPERATION ............................7
REMOVAL .............................7
INSTALLATION ..........................7
SPARK PLUG CABLE
DESCRIPTION ..........................7
REMOVAL .............................7
INSTALLATION ..........................8
STARTER BUTTON
REMOVAL .............................9
INSTALLATION .........................10
IGNITION CONTROL
DESCRIPTION - IGNITION SYSTEM
NOTE: All engines use a fixed ignition timing sys-
tem. Basic ignition timing is not adjustable. All
spark advance is determined by the Powertrain
Control Module (PCM).
The distributorless ignition system used on these
engines is referred to as the Direct Ignition System
(DIS). The system’s three main components are the
coils, crankshaft position sensor, and camshaft posi-
tion sensor.
OPERATION - IGNITION SYSTEM
The crankshaft position sensor and camshaft posi-
tion sensor are hall effect devices. The camshaft posi-
tion sensor and crankshaft position sensor generate
pulses that are inputs to the PCM. The PCM deter-
mines engine position from these sensors. The PCM
calculates injector sequence and ignition timing from
crankshaft & camshaft position. For a description of
both sensors, refer to Camshaft Position Sensor and
Crankshaft Position Sensor.
SPECIFICATIONS
TORQUE
DESCRIPTION N·m Ft. Lbs. In. Lbs.
Camshaft Position Sensor
Screw
10.7 95
Crankshaft Position Sen-
sor Screw
10.7 95
Ignition Coil to Cyl. Head
Screw
10.7 95
Spark Plugs 27 20
ZB IGNITION CONTROL 8I - 1
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