Dodge ram truck 3500 1996 Service Manual page 1281

BR FUEL SYSTEM 1 4 - 4 7
DIAGNOSIS AND TESTING (Continued)
(2) Inspect the battery cable connections. Be sure
that they are clean and tight.
(3) Inspect fuel pump relay and air conditioning
compressor clutch relay (if equipped). Inspect the
ASD relay connections. Inspect starter motor relay
connections. Inspect relays for signs of physical dam­
age and corrosion. The relays are located i n the
Power Distribution Center (PDC) (Fig. 47). Refer to
label on PDC cover for relay location.
POWER
DISTRIBUTION
CENTER
(PDC)
J9414-10
Fig. 47 Power Distribution Center (PDC)
(4) Inspect ignition coil pack primary connections.
Verify that secondary cables are firmly connected to
coils (Fig. 48).
(6) Verify that generator output wire, generator
connector and ground wire are firmly connected to
the generator.
(7) Inspect the system body grounds for loose or
dirty connections. Refer to Group 8, Wiring for
ground locations.
(8) Verify crankcase ventilation (CCV) operation.
Refer to Group 25, Emission Control System for addi­
tional information.
(9) Inspect fuel tube quick-connect fitting-to-fuel
rail connections.
(10) Verify that hose connections to all ports of
vacuum fittings on intake manifold are tight and not
leaking.
(11) Inspect accelerator cable, transmission throt­
tle cable (if equipped) and cruise control cable con­
nections (if equipped). Check their connections to the
throttle arm of throttle body for any binding or
restrictions.
(12) I f equipped with vacuum brake booster, verify
that vacuum booster hose is firmly connected to fit­
ting on intake manifold. Also check connection to
brake vacuum booster.
(13) Inspect the air cleaner inlet and air cleaner
element for dirt or restrictions.
(14) Inspect radiator grille area, radiator fins and
air conditioning condenser for restrictions.
(15) Verify that the intake manifold air tempera­
ture sensor wire connector is firmly connected to har­
ness connector (Fig. 49).
II
INTAKE MANIFOLD
ENGINE
- C Y L I N D E R ^
1
NUMBER
Fig. 48 Ignition Coil Pack—8.0L Engine
(5) Be sure that spark plug cables are firmly con­
nected and the spark plugs are in their correct firing
order. Be sure that camshaft position sensor wire
connector is firmly connected to harness connector.
Inspect spark plug condition. Refer to Group 8D,
Ignition. Connect vehicle to an oscilloscope and
inspect spark events for fouled or damaged spark
plugs or cables.
J948D-10
Fig. 49 Air Temperature Sensor—8.0L Engine
(16) Verify that MAP sensor electrical connector is
firmly connected to MAP sensor (Fig. 50).
(17) Verify that fuel injector wire harness connec­
tors are firmly connected to injectors in the correct
order. Each harness connector is numerically tagged
with the injector number (INJ 1, INJ 2 etc.) of its
corresponding fuel injector and cylinder number.