1999 DODGE RAM Fuel pressure

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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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.

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. On 3.9L, 5.2L and 5.9L
with light-duty emissions, DO NOT remove ignition coil-to-cylinder
head mounting bracket bolts, as these bolts are under tension. On all
applications, to install, reverse removal procedure. Tighten ignition
coil retaining bolts or nuts to specification. See TORQUE
SPECIFICATIONS.
Removal & Installation (Ram Pickup 8.0L)
1) Two separate ignition coils are located above passenger's
side valve cover. Each ignition coil can be serviced separately. On
all ignition coil applications, disconnect spark plug wires and
electrical connector from ignition coil.
2) Remove ignition coil retaining bolts and ignition coil
from ignition coil mounting bracket. To install, reverse removal
procedure. Ensure ignition coil is mounted on ignition coil mounting
bracket with electrical connector facing downward. Tighten ignition
coil retaining bolts to specification. See TORQUE SPECIFICATIONS.
FUEL SYSTEM
FUEL SYSTEM PRESSURE RELEASE
WARNING: Always release fuel pressure before disconnecting any fuel
injection-related component. DO NOT allow fuel to contact
engine or electrical components.
1) Remove fuel cap from fuel tank. Note location of spring
loaded flapper valve inside fuel tank filler tube assembly. Flapper
valve is located just below the fuel cap area on fuel tank filler tube
assembly. Flapper valve is used as a secondary way of sealing the fuel
tank if fuel cap was not properly tightened.
WARNING: When opening flapper valve inside fuel tank filler tube
assembly, ensure a non-metallic object is used to prevent any
sparks.
2) Using a non-metallic object, push flapper valve inside
filler tube assembly downward to release any pressure from the fuel
tank. Ensure all pressure is released from fuel tank.
3) Remove fuel pump relay from Power Distribution Center
(PDC). Fuel pump relay may be identified by label on inside of PDC
cover. See POWER DISTRIBUTION CENTER (PDC) LOCATION table.
4) On all models, start engine and allow engine to idle until
engine stalls. Attempt to restart engine until engine will no longer
run. Turn ignition off.
CAUTION: Ensure steps 1) through 4) are performed before proceeding.
Steps 3) and 4) must be performed to ensure most of the fuel
pressure is released from fuel rails to prevent an excessive
amount of fuel being delivered into the cylinders.
5) Remaining fuel pressure is released by energizing a fuel
injector. Disconnect electrical connector at any fuel injector.
6) Connect jumper wire between one electrical terminal on
fuel injector and positive battery terminal. Connect another jumper
wire on remaining electrical terminal on fuel injector.

CAUTION: DO NOT apply battery voltage to fuel injector for extended
periods, or fuel injector may be damaged.
7) Momentarily touch remaining end of jumper wire to negative
battery terminal in short intervals to energize fuel injector and
release remaining fuel pressure.
8) Remove jumper wires. Reinstall electrical connector and
fuel pump relay. Fuel system components may now be serviced. Cover
fuel lines with shop towel before disconnecting, as some residual fuel
pressure may exist.
9) Diagnostic Trouble Code (DTCs) may have been stored in
Powertrain Control Module (PCM) due to the removal of fuel pump relay.\
Using scan tool, clear DTCs from PCM. See appropriate SELF-DIAGNOSTICS
article for clearing of DTCs.
FUEL LINE DISCONNECT FITTINGS
NOTE: Fuel lines may contain single tab, dual tab or plastic
retainer ring disconnect fitting. See Fig. 24. Determine type
of disconnect fitting used and use proper procedure for
proper disconnect fitting.
Fig. 24: Identifying Fuel Line Disconnect Fitting
Courtesy of Chrysler Corp.
Removal & Installation (Single Tab)
1) Release fuel pressure. See FUEL SYSTEM PRESSURE RELEASE

N - R EM OVE /IN STA LL/O VER HAU L
under FUEL SYSTEM. Disconnect negative battery cable. Ensure disconnect fitting and fuel lines are clean. Note location of releasetab and pull tab on disconnect fitting. See Fig. 24.
CAUTION: Release tab must be pressed downward before removing pull
tab, or pull tab will be damaged. 2) Press release tab downward. Use screwdriver to pry pull tab upward until pull tab separates from disconnect fitting. Removedisconnect fitting from fuel line. Inspect components for damage. Ifdisconnect fitting is damaged, entire assembly must be replaced, asonly pull tab may be replaced. 3) To install, ensure fuel line and disconnect fitting areclean. Lubricate fuel line and disconnect fitting with engine oil.Install disconnect fitting on fuel line until disconnect fittingbottoms on fuel line. 4) Install NEW pull tab until pull tab locks in disconnectfitting. DO NOT reuse old pull tab. Pull on fuel line and disconnectfitting to ensure components are properly locked together. Reconnectnegative battery cable. Start engine and check for leaks. Removal & Installation (Dual Tab)
1) Release fuel pressure. See FUEL SYSTEM PRESSURE RELEASE under FUEL SYSTEM. Disconnect negative battery cable. Ensuredisconnect fitting and fuel lines are clean. Note location of tabs ondisconnect fitting. See Fig. 24.
2) Squeeze both tabs against disconnect fitting. Pulldisconnect fitting from fuel line. The plastic retainer will remain onthe fuel system component being serviced. The "O" rings and spacerwill remain in the disconnect fitting. 3) Inspect components for damage. If disconnect fitting isdamaged, entire assembly must be replaced. The only component that maybe replaced is the plastic retainer. If plastic retainer must beremoved from fuel system component, carefully release the plasticretainer from the fuel system component using 2 screwdrivers. Inspectplastic retainer for cracks or damage. Replace plastic retainer ifdefective. 4) To install, ensure fuel line and disconnect fitting areclean. Lubricate fuel line and disconnect fitting with engine oil.Install disconnect fitting on fuel line until click sound is heard. 5) Pull on fuel line and disconnect fitting to ensurecomponents are properly locked together. Reconnect negative batterycable. Start engine and check for leaks. Removal & Installation (Plastic Retainer Ring)
1) Release fuel pressure. See FUEL SYSTEM PRESSURE RELEASE under FUEL SYSTEM. Disconnect negative battery cable. Ensuredisconnect fitting and fuel lines are clean. Note location of plasticretainer ring on disconnect fitting. See Fig. 24.
NOTE: Plastic retainer ring must be pressed evenly into disconnect fitting. If plastic retainer is not even, it will be difficult to remove disconnect fitting from fuel line. 2) Firmly push disconnect fitting toward the fuel line while pushing plastic retainer ring evenly into disconnect fitting. Withplastic retainer ring fully depressed, pull disconnect fitting fromfuel line. 3) Inspect components for damage. If disconnect fitting isdamaged, entire assembly must be replaced. 4) To install, ensure fuel line and disconnect fitting areclean. Lubricate fuel line and disconnect fitting with engine oil.Install disconnect fitting on fuel line until click sound is heard.

5) Pull on fuel line and disconnect fitting to ensure
components are properly locked together. Reconnect negative battery
cable. Start engine and check for leaks.
FUEL LINE AT FUEL RAIL
Removal & Installation (Dakota, Durango & Ram Pickup)
1) Release fuel pressure. See FUEL SYSTEM PRESSURE RELEASE
under FUEL SYSTEM. Disconnect negative battery cable.
2) Ensure area around fuel line fitting on fuel line and fuel
rail is clean. Using screwdriver, pry latch clip from fuel line
fitting and fuel rail while sliding latch clip toward fuel rail.
Perform STEP 1. See Fig. 25.
3) Insert Fuel Line Remover (Snap-On FIH-9055-1) into fuel
line fitting to release locking fingers inside fuel line fitting.
Perform STEP 2. See Fig. 25. Pull fuel line fitting with fuel line
from fuel rail.
4) Inspect fuel line fitting components for damage. If fuel
line fitting components are damaged, entire fuel line assembly must be
replaced.
5) To install, ensure fuel line fitting and fuel rail are
clean. Lubricate fuel line fitting and fuel rail with engine oil.
Install fuel line fitting on fuel rail until click sound is heard.
6) Install latch clip. Ensure latch clip snaps into position.
If latch clip will not fit properly, check for improper installation
of fuel line fitting on fuel rail. Pull on fuel line to ensure fuel
line fitting is properly locked on fuel rail. Reconnect negative
battery cable. Start engine and check for leaks.
Fig. 25: Disconnecting Fuel Line At Fuel Rail (Dakota, Durango &
Ram Pickup)
Courtesy of Chrysler Corp.
Removal & Installation (Ram Van & Ram Wagon)

1) Release fuel pressure. See FUEL SYSTEM PRESSURE RELEASE
under FUEL SYSTEM. Disconnect negative battery cable.
2) Ensure area around fuel line fitting on fuel line and fuel
rail is clean. Press sides of latch clip on fuel line fitting together
while rotating latch clip upward. See Fig. 26. Pull fuel line fitting
from fuel rail.
3) Inspect fuel line fitting for damage. If fuel line fitting
is damaged, entire fuel line assembly must be replaced.
4) To install, ensure fuel line fitting and fuel rail are
clean. Lubricate fuel line fitting and fuel rail with engine oil.
Install fuel line fitting on fuel rail.
5) Rotate latch clip downward so it snaps into position.
Ensure latch clip is fully snapped into position. If latch clip will
not snap into position, check for improper installation of fuel line
fitting on fuel rail. Pull on fuel line to ensure fuel line fitting is
properly locked on fuel rail. Reconnect negative battery cable. Start
engine and check for leaks.
Fig. 26: Disconnecting Fuel Line At Fuel Rail (Ram Van & Ram Wagon)
Courtesy of Chrysler Corp.
FUEL FILTER
Removal & Installation
Fuel filter is incorporated into the fuel pressure regulator.
A separate frame mounted fuel filter is not used. For servicing for
fuel filter/fuel pressure regulator, see FUEL FILTER/FUEL PRESSURE
REGULATOR.
FUEL FILTER/FUEL PRESSURE REGULATOR
Removal

1) Fuel filter/fuel pressure regulator is mounted in rubber
grommet on top of fuel pump module. See Figs. 27-30. Fuel pump module
is located on top of fuel tank.
2) Manufacturer recommends removing fuel tank for access to
fuel filter/fuel pressure regulator. See FUEL TANK. Ensure area around
fuel filter/fuel pressure regulator and fuel pump module is clean.
CAUTION: When removing fuel filter/fuel pressure regulator from fuel
tank, DO NOT pull fuel filter/fuel pressure regulator more
than 3.0" (76 mm) from fuel tank or plastic fuel line
attached to fuel filter/fuel pressure regulator may be
damaged.
3) Using twisting motion, pull fuel filter/fuel pressure
regulator from rubber grommet on fuel pump module. Ensure fuel
filter/fuel pressure regulator is not pulled more than 3.0" (76 mm)
from fuel tank or plastic fuel line attached to fuel filter/fuel
pressure regulator may be damaged.
4) Carefully cut plastic fuel line-to-fuel filter/fuel
pressure regulator retaining clamp. Use care not to damage plastic
fuel line. Remove retaining clamp. Remove plastic fuel line from fuel
filter/fuel pressure regulator.
Installation
1) Install plastic fuel line with NEW retaining clamp on fuel
filter/fuel pressure regulator. Rotate fuel filter/fuel pressure
regulator in plastic fuel line until fuel line fitting on side fuel
filter/fuel pressure regulator points proper direction. See
POSITIONING FUEL FILTER/FUEL PRESSURE REGULATOR table.
POSITIONING FUEL FILTER/FUEL PRESSURE REGULATOR









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Application Location Of Fuel Line Fitting
Dakota ............................. Toward Driver's Side Of Vehicle
Durango .................................... Toward Front Of Vehicle
Ram Pickup, Ram Van & Ram Wagon .... Toward Driver's Side Of Vehicle









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CAUTION: Ensure Crimping Pliers (C-4124) are used to crimp retaining
clamp for plastic fuel line. DO NOT use conventional side
cutters to crimp retaining clamp.
2) Using Crimping Pliers (C-4124), crimp retaining clamp for\
plastic fuel line. Ensure plastic fuel line is securely attached on
fuel filter/fuel pressure regulator.
3) To install remaining components, reverse removal
procedure. Ensure fuel filter/pressure regulator is installed in
rubber grommet on fuel pump module so fuel line fitting on side fuel
filter/fuel pressure regulator points toward proper direction before
installing fuel tank. See POSITIONING FUEL FILTER/FUEL PRESSURE
REGULATOR table. Reinstall fuel tank using proper procedure.