Dodge RAM TRUCK 1500 1995 Service Manual page 403

8D - 30 IGNITION SYSTEMS
B R
POWERTRAIN CONTROL
MODULE (PCM) J9414-11
Fig. 19 PCM Location—Typical
PCM
MOUNTING
PCM CONNECTOR
CONNECTOR MOUNTING
BOLT
m u
. g
Fig. 20 PCM Mounting
(2) Remove 60-way electrical connector from PCM
(one bolt) (Fig. 20).
(3) Remove the three PCM mounting bolts (Fig.
20).
(4) Remove PCM from vehicle.
INSTALLATION
(1) Check pins in PCM 60-way connector for dam­
age. Repair as necessary.
(2) Position PCM and install mounting bolts.
Tighten bolts to 1 N-m (9 in. lbs.) torque.
(3) Connect 60-way electrical connector to PCM.
Tighten bolt to 4 N-m (35 in. lbs.) torque.
(4) Connect negative battery cable to battery.
SPARK PLUGS '
On 3.9L V-6 or 5.2/5.9L V-8 engines, spark plug ca­
ble heat shields are pressed into the cylinder head to
surround each cable boot and spark plug (Fig. 21).
These shields protect the spark plug boots from dam­
age (due to engine heat generated by the exhaust
manifolds) and should not be removed. After the
spark plug cable has been installed, the lip of the ca­
ble boot should have a small air gap to the top of the
heat shield (Fig. 21).
Fig. 21 Heat Shields—3.9L V-6 or S.2/5.9L V-8
Engines
If removal of the heat shield(s) is necessary, remove
the spark plug cable and compress the sides of shield
for removal. Each shield is slotted to allow for com­
pression and removal. To install the shields, align
shield to machined opening in cylinder head and tap
into place with a block of wood.
PLUG REMOVAL
ALL ENGINES
(1) Always remove spark plug or ignition coil ca­
bles by grasping at the cable boot. Turn the cable
boot 1/2 turn and pull straight back in a steady mo­
tion (Fig. 22). Never pull directly on the cable. Inter­
nal damage to cable will result.
(2) Prior to removing the spark plug, spray com­
pressed air around the spark plug hole and the area
around the spark plug. This will help prevent foreign
material from entering the combustion chamber.
(3) Remove the spark plug using a quality socket
with a rubber or foam insert.
(4) Inspect the spark plug condition. Refer to
Spark Plugs in the Diagnostics/Service Procedures
section of this group.
PLUG CLEANING
The plugs may be cleaned using commercially
available spark plug cleaning equipment. After clean-