Fuel DODGE RAM 1999 Service Repair Manual

Apply light coat of engine oil on NEW .060" (1.5 mm) thick Copper
sealing washer. Install NEW Copper sealing washer on spray tip of fuel
injector. Engine oil is used to aid holding sealing washer in place.
Install new "O" ring on fuel injector. Apply small amount of engine
oil to "O" ring.
2) Ensure fuel inlet hole on side of fuel injector is
positioned toward injector connector tube. Install injector into
cylinder head bore using care not to allow injector tip to touch sides
of bore. Press fuel injector into cylinder head with finger pressure
only. Install fuel injector hold down clamp into shouldered bolt while
aligning slot in top of injector into groove in bottom of clamp.
Tighten opposite clamp bolt to specification. See TORQUE
SPECIFICATIONS.
3) Apply small amount of clean engine oil to NEW "O" ring.
Install "O" ring to fuel injector connector tube. Using finger
pressure only, press injector connector tube into cylinder head.
Connect and tighten high pressure fuel lines to specification. See
TORQUE SPECIFICATIONS.
NOTE: Fuel line fitting torque is important. Mating surfaces will
not seal if fuel line fitting is under or over-torqued.
4) To install remaining components, reverse removal
procedure. Tighten bolts to specification. See TORQUE SPECIFICATIONS.
Bleed high-pressure fuel lines. See FUEL LINE BLEEDING under FUEL
SYSTEM.
FUEL INJECTION PUMP
CAUTION: High-pressure fuel lines must be clamped securely and routed
so they do not contact each other or any other components. DO
NOT weld or substitute high-pressure fuel lines. High
-pressure lines are same length and proper high-pressure fuel
line must be installed in specified area for proper engine
operation.
Removal
1) Disconnect negative battery cables. Clean fuel lines at
cylinder head and injection pump. Clean fuel injection pump and fuel
lines at side of pump. Disconnect 9-pin electrical connector at Fuel
Pump Control Module (FPCM). Place a rag around overflow valve to catch\
excess fuel. Remove overflow valve and disconnect fuel return line.
Remove banjo bolts and fuel supply line at side of injection pump and
top of fuel filter housing.
2) Remove all high pressure fuel lines, intake air tube,
accelerator pedal position sensor, air intake housing, engine oil
dipstick tube, wiring clips, electrical connectors at intake heaters,
and engine lifting bracket. Unscrew plastic access cap at front gear
cover. Remove injection pump gear-to-injection pump shaft nut and
washer.
3) Engine may be rotated by removing dust plug from
transmission adapter plate and installing Engine Barring Tool (Snap-On
SP371) in transmission adapter plate. See Fig. 9. Rotate engine until
keyway is at 12 o'clock position.

Fig. 9: Rotating Engine
Courtesy of Chrysler Corp.
CAUTION: Engine must be rotated until keyway is at 12 o'clock position
to prevent pump/gear keyway from falling into gear housing.
If gear retainer nut, washer or key drops into gear housing,
cover may have to be removed to retrieve them before engine
start.
4) Using gear puller, separate injection pump gear from
injection pump shaft. See Fig. 11. DO NOT pull fuel injection pump
drive gear too far forward or timing gear cover may be damaged.
5) Remove 3 lower fuel injection pump-to-lower mounting
bracket bolts. Loosen 2 engine bracket bolts. See Fig. 10. Remove 4
fuel injection pump-to-gear housing nuts. Remove fuel injection pump.
Use care not to scratch or damage shaft of fuel injection pump during
removal.

Fig. 10: Removing Lower Pump Bracket & Mounting Bolts
Courtesy of Chrysler Corp.
Fig. 11: Removing Fuel Injection Pump Drive Gear
Courtesy of Chrysler Corp.
NOTE: Before installing fuel injection pump, ensure shaft on fuel
injection pump is properly positioned for proper fuel

injection pump timing, cylinder No. 1 at TDC on compression
stroke and timing pin is engaged in machined hole on camshaft
gear.
Installation
1) Check pump mounting surfaces at pump and mounting flange
for nicks, cuts or damage. Check "O" ring surfaces for nicks, cuts or
damage. Clean injection pump mounting flange at gear housing. Clean
front of injection pump. Install new "O" ring on pump mounting area.
Apply clean engine oil to injection pump "O" ring only.
CAUTION: Ensure fuel injection pump drive gear-to-shaft mating
surfaces are clean and free of oil to provide proper seating
of fuel injection pump drive gear on shaft of fuel injection
pump.
2) Pump/gear keyway has an arrow and 3-digit number stamped
at top edge. See Fig. 12. Position keyway into pump shaft with arrow
pointed toward rear of pump. Ensure 3-digit number stamped on top of
keyway is identical as 3-digit number stamped on injection pump data
plate. If incorrect keyway is installed, a Diagnostic Trouble Code
(DTC) may be set.
Fig. 12: Locating Keyway Arrow & Keyway Number
Courtesy of Chrysler Corp.
3) Position pump assembly to mounting flange on gear cover
while aligning injection pump shaft through back of injection pump

gear. When installing pump, ensure dowel on mounting flange must align
with hole in front of pump. Ensure fuel injection pump is flat against
gear housing. Install 4 fuel injection pump-to-gear housing nuts
finger tight. DO NOT tighten nuts at this time.
CAUTION: DO NOT tighten pump to gear cover using mounting nuts. Damage
to pump or gear cover may result. Pump must be positioned
flat to mounting flange before attempting to tighten mounting
nuts.
4) Install fuel injection pump shaft washer and nut to pump
shaft finger tight. Position lower pump bracket and install 3 bolts
finger tight. Tighten fuel injection pump drive gear nut to
preliminary torque of 22 ft. lbs. (30 N.m). Tighten 4 fuel injection
pump nuts and 3 lower pump bracket-to-pump bolts to specification.
Tighten 2 engine bracket-to-engine bolts to specification. See TORQUE
SPECIFICATIONS Final tighten injection pump shaft nut. Use barring
tool to prevent engine from rotating.
5) Install plastic access cap to front gear cover. Using new
gaskets, install fuel return line and overflow valve to side of
injection pump. Tighten overflow valve to specification. See TORQUE
SPECIFICATIONS Using new gaskets, install fuel supply line to side of
injection pump and top of fuel filter housing. Tighten banjo bolts to
specification. TORQUE SPECIFICATIONS.
6) To complete installation, reverse removal procedure. Bleed
air from fuel system. See FUEL LINE BLEEDING.
FUEL TANK ROLLOVER VALVE
Removal
1) Fuel tank rollover valve is pressed into rubber grommet on
top of fuel tank module. See Fig. 7. Manufacturer recommends removing
fuel tank for access to fuel tank rollover valve.
NOTE: It may be necessary to disconnect fuel lines and electrical
connector from fuel tank module so fuel tank may be lowered
for access to fuel tank rollover valve.
2) Raise and support vehicle. Disconnect negative battery
cables. Drain fuel tank. Remove fuel tank filler tube bolts from body.
Support fuel tank with transmission jack. Remove fuel tank straps and
heat shields (if equipped).
NOTE: Manufacturer recommends replacing rubber grommet on fuel tank
module when servicing fuel tank rollover valve.
3) Slightly lower fuel tank for access to fuel tank rollover
valve. Disconnect electrical connector and fuel lines from fuel tank
module if necessary to gain access to fuel tank rollover valve. Use
proper procedure when disconnecting fuel lines. See FUEL LINE
DISCONNECT FITTINGS under FUEL SYSTEM.
4) Disconnect hose from fuel tank rollover valve. Pry one
side of fuel tank rollover valve from rubber grommet. Remove fuel tank
rollover valve. Remove rubber grommet.
Installation
1) To install, reverse removal procedure using NEW rubber
grommet. If fuel lines were disconnected, install fuel lines on fuel
tank module using proper procedure. See FUEL LINE DISCONNECT FITTINGS
under FUEL SYSTEM.
2) Reinstall fuel tank. Tighten fuel tank strap nuts to
specification. See TORQUE SPECIFICATIONS. Reconnect negative battery
cables.

FUEL TRANSFER PUMP
Removal
1) Disconnect negative battery cables. Clean area around
transfer pump and fuel lines. Remove starter. Place a drain pan below
pump. Disconnect fuel line fitting at fuel supply line. Remove support
bracket bolt at top of pump. Remove banjo bolts at front and rear of
pump.
2) Disconnect pigtail harness electrical connector from main
engine wiring harness. Remove 3 pump bracket nuts. Remove fuel
transfer pump.
Installation
1) Install new gaskets to fuel supply line, support bracket,
and banjo bolt at rear of pump. Install banjo bolt finger tight.
Install new gaskets to fuel line and banjo bolt at front of pump.
Position 3 pump studs into pump mounting bracket and install 3 nuts
finger tight. Install support bracket bolt finger tight.
2) Tighten bolts and nuts evenly to specification. See TORQUE
SPECIFICATIONS. Reconnect electrical connectors. Tighten fuel lines to
specification. Install starter and negative battery cables. Bleed low-
pressure fuel lines. See FUEL LINE BLEEDING under FUEL SYSTEM.
HIGH-PRESSURE FUEL LINES
CAUTION: High-pressure fuel lines must be clamped securely and routed
so they do not contact each other or any other components. DO
NOT weld or substitute high-pressure fuel lines. High
-pressure lines are same length and proper high-pressure fuel
line must be installed in specified area for proper engine
operation.
Removal
1) Disconnect negative battery cables. Remove nameplate
located above rocker lever covers. Disconnect necessary clamps from
high-pressure fuel lines.
2) Ensure area around each high-pressure fuel line nut is
clean. Mark high-pressure fuel line location for installation
reference. Remove high-pressure fuel line from fuel injector.
3) Remove high-pressure fuel lines from fuel injection pump.
Remove high-pressure fuel lines from engine, using care not to bend
the fuel line.
Installation
To install, reverse removal procedure. Ensure all high-
pressure fuel line nuts are tightened to specification at fuel
injector and fuel injection pump before tightening clamp bolts to
specification. Bleed high-pressure fuel lines. See FUEL LINE BLEEDING
under FUEL SYSTEM.
OVERFLOW VALVE
Removal & Installation
1) Disconnect negative battery cables. Ensure area around
overflow valve is clean. Remove valve from pump and banjo fitting.
Discard gaskets.
2) To install, reverse removal procedure using NEW gaskets.
Tighten overflow valve to specification. See TORQUE SPECIFICATIONS.
EMISSION SYSTEMS & SUB-SYSTEMS

Removal & Installation
See INTAKE MANIFOLD AIR HEATER RELAYS under RELAYS &
SOLENOIDS.
TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS








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Application Ft. Lbs. (N.m)\
Access Plug ................................................ 11 (15)\
AFC Line-To-Fuel Injection Pump Fitting .................... 18 (24)\
Air Inlet Housing Bolt ..................................... 18 (24)\
Engine Bracket-To-Engine Bolts ............................. 18 (24)\
Engine Coolant Temperature Sensor .......................... 40 (54)\
Engine Speed Sensor Nut .................................... 18 (24)\
Fuel Injection Pump Drive Gear Nut ....................... 125 (170)\
Fuel Injection Pump Lower Bracket-To-Pump Bolts ............ 18 (24)\
Fuel Injection Pump Mount Nuts ............................. 32 (43)\
Fuel Injector Retaining Nut ................................ 44 (60)\
Fuel Line-To-Fuel Heater Fitting ........................... 18 (24)\
Fuel Line-To-Fuel Transfer Pump ............................ 18 (24)\
Fuel Supply Line Banjo Bolt ................................ 18 (24)\
Fuel Tank Strap Nut ........................................ 30 (41)\
Fuel Transfer Pump Bolt .................................... 18 (24)\
High-Pressure Fuel Line Clamp Bolt ......................... 18 (24)\
High-Pressure Fuel Line Nut (At Injector) .................. 28 (38\
)
High-Pressure Fuel Line Nut (At Pump) ...................... 18 (24\
)
Intake Manifold Air Heater Housing Bolt .................... 18 (24)\
Intake Manifold Air Temperature Sensor ..................... 20 (27)\
Intake Manifold Cover Bolt ( 1) ............................. 18 (24)
Oil Fill Plug .............................................. 21 (29)\
Overflow Valve-To-Fuel Injection Pump ...................... 24 (33)\
Park/Neutral Switch ........................................ 25 (34)\
Plastic Fuel Tank Module Lock Nut .......................... 32 (43)\
Starter Mounting Bolt ...................................... 32 (43)\
Turbocharger Oil Drain Line Bolt ........................... 18 (24)\
Turbocharger Oil Supply Line Nut ........................... 11 (15)\
Turbocharger Retaining Nut ................................. 24 (33)\
INCH Lbs. (N.m)
Air Inlet Tube-To-Turbocharger Clamp Nut .................. 72 (8.1)\
Canister Nut ............................................ 120 (13.6)\
Condenser-To-Intercooler Nut ............................. 95 (10.7)\
Condenser-To-Intercooler Screw ........................... 95 (10.7)\
Drain Valve-To-Canister Bolt .............................. 40 (4.5)\
Exhaust Pipe-To-Turbocharger Clamp Nut .................... 72 (8.1)\
Fuel Bleed Bolt ........................................... 72 (8.1)\
Fuel Injector Drain Line Assembly Retaining Clamp Bolt .. 120 (13.6)\
Fuel Injector Drain Line-To-Fuel Injector Banjo Bolt ...... 84 (9.5)\
Intake Manifold Air Heater Relay Assembly Retaining Bolt .. 40 (4.5)\
Intercooler Bolt .......................................... 17 (1.9)\
Intercooler Inlet & Outlet Duct Clamp ..................... 72 (8.1)\
PCM Mounting Bolt ......................................... 35 (4.0)\
Water-In-Fuel (WIF) Sensor ................................ 20 (2.3\
)
( 1) - Apply thread sealant to bolt threads.









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1) Partially drain cooling system. Engine coolant temperature
sensor is located on front of intake manifold, near inside of
generator and contains a Tan/Black wire and a Black/Light Blue wire in
the electrical connector.
2) On 3.9L, remove engine cover and air cleaner housing from
inside of vehicle for access to engine coolant temperature sensor. On
5.2L and 5.9L, engine coolant temperature sensor may be serviced from
front of vehicle without removing engine cover and air cleaner
housing.
3) On all models, disconnect electrical connector at engine
coolant temperature sensor. It may be necessary to use a coat hanger
and fabricate an "L" shaped tool about 8" (203 mm) long to disconnect
electrical connector by placing hook part of tool under electrical
connector and pulling electrical connector upward from engine coolant
temperature sensor. Remove engine coolant temperature sensor.
Installation
To install, reverse removal procedure. Tighten engine coolant
temperature sensor to specification. See TORQUE SPECIFICATIONS. Fill
cooling system.
FUEL LEVEL SENSOR
Removal & Installation
See FUEL LEVEL SENSOR under FUEL SYSTEM.
INTAKE AIR TEMPERATURE (IAT) SENSOR
NOTE: Intake air temperature sensor may also be referred to as
intake manifold air temperature sensor.
Removal & Installation (Dakota, Durango & Ram Pickup)
1) IAT sensor is screwed into the intake manifold. See Fig. 4
, 5 or 6. Remove air inlet duct or air cleaner assembly for access to
IAT sensor if necessary. Disconnect electrical connector at IAT
sensor. Remove IAT sensor from intake manifold.
2) To install, reverse removal procedure. Tighten IAT sensor
to specification. See TORQUE SPECIFICATIONS.
Removal & Installation (Ram Van & Ram Wagon)
1) IAT sensor is screwed into the intake manifold. See Fig. 5
. On 3.9L, remove engine cover and air cleaner housing from inside of
vehicle for access to IAT sensor. On 5.2L and 5.9L, IAT sensor may be
serviced from front of vehicle without removing engine cover and air
cleaner housing.
2) On all models, disconnect electrical connector at IAT
sensor. Remove IAT sensor from intake manifold. To install, reverse
removal procedure. Tighten IAT sensor to specification. See TORQUE
SPECIFICATIONS.
Fig. 4: Locating Intake Air Temperature (IAT) Sensor (Dakota 2.5L)
Courtesy of Chrysler Corp.

TRANSMISSION TEMPERATURE SENSOR
Removal & Installation (A/T Models)
Transmission temperature sensor is located on transmission
valve body, incorporated into governor pressure sensor. See
appropriate ELECTRONIC CONTROLS article in AUTOMATIC TRANSMISSIONS
section.
UPSTREAM OXYGEN SENSOR
NOTE: Upstream oxygen sensor may also be referred to as pre
-catalyst oxygen sensor.
Removal
Upstream oxygen sensor is mounted on exhaust pipe, in front
of catalytic converter. Raise and support vehicle. Disconnect
electrical connector for upstream oxygen sensor. Using Socket
(YA8875), remove upstream oxygen sensor from exhaust pipe.
Installation
1) If installing original or used upstream oxygen sensor,
apply anti-seize compound on threads of upstream oxygen sensor. A NEW
upstream oxygen sensor should already be coated with anti-seize
compound.
2) Install and tighten upstream oxygen sensor to
specification. See TORQUE SPECIFICATIONS. Install electrical
connector.
MOTORS, RELAYS & SOLENOIDS
IDLE AIR CONTROL (IAC) MOTOR
Removal & Installation (Dakota, Durango, Ram Pickup 3.9L,
5.2L & 5.9L, Ram Van & Ram Wagon)
1) IAC motor is located on throttle body and contains a 4-pin
electrical connector. On Ram Van and Ram Wagon, remove engine cover.
2) On all models, remove air inlet duct or air cleaner
assembly for access to IAC motor. Disconnect electrical connector at
IAC motor. Remove retaining bolts and IAC motor from throttle body.
3) To install, reverse removal procedure. Tighten IAC motor
retaining bolts to specification. See TORQUE SPECIFICATIONS.
Removal & Installation (Ram Pickup 8.0L)
1) IAC motor is located at rear of throttle body and contains
a 4-pin electrical connector. Remove air inlet duct at air cleaner
assembly. Remove cover from air cleaner assembly.
2) Remove air cleaner housing-to-throttle body nuts and air
cleaner housing from throttle body. Disconnect electrical connector at
IAC motor. Remove retaining bolts and IAC motor.
3) To install, reverse removal procedure. Tighten IAC motor
retaining bolts and air cleaner housing-to-throttle body nuts to
specification. See TORQUE SPECIFICATIONS.
A/C RELAY, AUTO SHUTDOWN (ASD) RELAY & FUEL PUMP RELAY
NOTE: A/C relay may also be referred to as A/C clutch relay or A/C
compressor clutch relay.
Removal & Installation
Relays are located in Power Distribution Center (PDC). Relays\
may be identified by label on inside of PDC cover. See POWER
DISTRIBUTION CENTER (PDC) LOCATION table.

Installation
1) If engine has not been rotated after removing distributor,
go to next step. If engine was rotated after removing distributor,
rotate crankshaft clockwise (viewed from front of engine) until
cylinder No. 1 is at Top Dead Center (TDC) on compression stroke and
timing mark on vibration damper aligns with TDC timing mark on timing
chain cover. Go to next step.
2) Ensure distributor mounting area on cylinder block is
clean. Install NEW "O" ring on distributor if necessary. Apply light
coat of engine oil on "O" ring.
3) Position distributor rotor so it aligns with terminal for
cylinder No. 1 on distributor cap. Install distributor. Ensure
distributor engages with slot in oil pump drive gear. Install hold-
down clamp and distributor hold-down bolt. DO NOT tighten distributor
hold-down bolt at this time.
4) Rotate distributor until distributor rotor aligns with
cylinder No. 1 alignment mark on camshaft position sensor. See Fig. 23
. Tighten distributor hold-down bolt to specification. See TORQUE
SPECIFICATIONS. To install remaining components, reverse removal
procedure.
5) Base ignition timing is nonadjustable. Base ignition
timing and timing advance are controlled by the Powertrain Control
Module (PCM). Distributor position is used to determine the fuel
system synchronization. To check for correct distributor position and
fuel system synchronization, see FUEL SYSTEM SYNCHRONIZATION under
FUEL SYSTEM in ON-VEHICLE ADJUSTMENTS article.
IGNITION COIL
Removal & Installation (Dakota 2.5L)
Ignition coil is located on side of engine, near distributor.
Service procedure is primarily an unbolt and bolt-on procedure.
Tighten ignition coil retaining bolts or nuts to specification. See
TORQUE SPECIFICATIONS.
Removal & Installation (Dakota 3.9L, 5.2L & 5.9L, Durango &
Ram Van/Wagon)
1) Ignition coil is located on front of passenger's side
cylinder head. Disconnect spark plug wires and electrical connector
from ignition coil.
CAUTION: Ignition coil-to-cylinder head mounting bracket bolts hold
the idler pulley for the accessory drive belt, as these bolts
are under tension. If necessary to remove these bolts,
accessory drive belt must be removed first.
2) Remove ignition coil retaining bolts or nuts with ignition
coil from the ignition coil mounting bracket. DO NOT remove ignition
coil-to-cylinder head mounting bracket bolts, as these bolts are under
tension.
3) To install, reverse removal procedure. Tighten ignition
coil retaining bolts or nuts to specification. See TORQUE
SPECIFICATIONS.
Removal & Installation (Ram Pickup 3.9L, 5.2L & 5.9L)
1) On 3.9L, 5.2L and 5.9L with light-duty emissions, ignition
coil is located on front of passenger's side cylinder head. On 5.9L
with heavy-duty emissions, ignition coil is located on top of air
injection pump. On all models, disconnect spark plug wires and
electrical connector from ignition coil.
CAUTION: On 3.9L, 5.2L and 5.9L with light-duty emissions, ignition
coil-to-cylinder head mounting bracket bolts hold the idler