Dodge RAM TRUCK 1500 1995 Service Manual page 378

B R
Fig. 9 Crankshaft Position Sensor—8.01 V-10
Engine—Typical
Fig. 10 Sensor Operation—S.OL V-10 Engine
crankshaft position has been determined, the PCM
begins energizing a ground circuit to each fuel injec­
tor to provide injector operation.
DISTRIBUTORS—3.9L V-6 OR 5.2/5.9L V-8
ENGINES
For component testing, refer to the Diagnostics/Ser­
vice Procedures section of this group.
All 3.9L V-6 and 5.2L/5.9L V-8 engines are
equipped with a camshaft driven mechanical distrib­
utor, containing a shaft driven distributor rotor. They
are equipped with an internal camshaft position (fuel
sync) sensor. This sensor provides fuel injection syn­
chronization and cylinder identification.
Distributors do not have built in centrifugal or vac­
uum assisted advance. Base ignition timing and all
timing advance is controlled by the powertrain con­
trol module (PCM). Because ignition timing is con­
trolled by the PCM, base ignition timing Is not
adjustable on any of these engines.
IGNITION SYSTEMS 80 - 5
Fig. 11 Ignition Coii—3.9L V-6 or 5.2/5.9L V-8
LDC-Gas Engines
Fig. 12 Ignition Coil—5.9L V-8 HDC-Gas Engine
The distributor is held to the engine in the conven­
tional method using a holddown clamp and bolt. Al­
though 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.
For removal and installation of this component, re­
fer to the Component Removal/Installation section of
this group.
IGNITION COIL—3 J L V-6 OR 5.2/5.9L V-8
ENGINES
3*§L V-6 or 5.2/5.9L V-8 LDC-Gas Engines: The
coil is mounted' to a bracket that is bolted to the
front of the right engine cylinder head (Fig. 11). This
bracket is mounted on top of the automatic belt ten­
sioner bracket using common bolts.
5.9L V-8 HDC-Gas Engine: The coil is mounted to
a bracket that is bolted to the air injection pump
(AIR pump) mounting bracket (Fig. 12).