1999 DODGE RAM oil pressure

NOTE: Oil pressure sensor may also be referred to as engine oil
pressure sensor.
Removal & Installation
For oil pressure sensor location, see OIL PRESSURE SENSOR
LOCATION table. Service information is not available from
manufacturer.
OIL PRESSURE SENSOR LOCATION









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Application Location
Dakota
2.5L ... ( 1) Passenger's Side Of Cylinder Block, Below Distributor
3.9L, 5.2L & 5.9L ... ( 1) Passenger's Side Rear Corner Of Cylinder
Block, Below Distributor
Durango .. ( 1) Passenger's Side Rear Corner Of Cylinder Block, Below
Distributor
Ram Pickup
3.9L, 5.2L & 5.9L ... ( 2) Passenger's Side Rear Corner Of Cylinder
Block, Below Distributor
8.0L ......................................... ( 2) Near Oil Filter
Ram Van & Ram Wagon ... ( 3) Passenger's Side Rear Corner Of Cylinder
Block, Below Distributor
( 1) - Contains a Gray/Yellow wire and a Black/Light Blue wire in the
electrical connector.
( 2) - Contains a Gray/Orange wire and a Black/Light Blue wire in the
electrical connector.
( 3) - Contains a Gray wire and a Black/Light Blue wire in the
electrical connector.









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OUTPUT SHAFT SPEED SENSOR
NOTE: Output shaft speed sensor may also be referred to as
transmission speed sensor.
Removal & Installation (A/T Models)
Output shaft speed sensor is located on lower edge of
overdrive case on rear of transmission. See Fig. 10. Disconnect
electrical connector at output shaft speed sensor. Remove output shaft
speed sensor with "O" ring from transmission. To install, reverse
removal procedure using NEW "O" ring.
Fig. 10: Locating Output Shaft Speed Sensor & Park/Neutral Switch
(A/T)
Courtesy of Chrysler Corp.
PARK/NEUTRAL SWITCH

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.

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

Fig. 28. Fuel tank must be removed for servicing of fuel pump module.
Remove fuel tank. See FUEL TANK under FUEL SYSTEM.
2) Ensure area around fuel pump module is clean. Rotate fuel
filter/pressure regulator so fuel line fitting on side fuel
filter/fuel pressure regulator points toward center of fuel pump
module.
3) Note location of metal fuel pump module lock ring and
locking fingers on the fuel tank. See Fig. 34. There are 6 locking
fingers molded into the plastic fuel tank.
4) Apply a small amount of engine oil on each locking finger
at the fuel pump module lock ring area. Engine oil will act as a
lubricant when removing fuel pump module lock ring.
5) Note location of lock tab on fuel pump module lock ring.
Pry lock tab backward while using a hammer and brass drift to tap fuel
pump module lock ring counterclockwise. Remove fuel pump module lock
ring, fuel pump module and rubber gasket from fuel tank.
CAUTION: When fuel pump module is removed from fuel tank, rubber
gasket must be replaced. DO NOT reuse rubber gasket.
Installation
1) Ensure sealing area on fuel tank is clean. Using NEW
rubber gasket, install fuel pump module on fuel tank. DO NOT reuse
rubber gasket. Ensure rubber gasket remains in place.
NOTE: Fuel pump module must be properly positioned in fuel tank to
prevent float from contacting the fuel tank.
2) Rotate fuel pump module so fuel pump is properly
positioned in the fuel tank. See Fig. 34. Apply a small amount of
engine oil on each locking finger at fuel pump module lock ring area.
Install fuel pump lock ring on fuel pump module.
3) Using a hammer and brass drift, tap fuel pump module lock
ring clockwise until the 6 locking fingers engage in fuel pump module
lock ring and lock tab engages notch on fuel pump module lock ring.
Ensure lock tab fully engages with notch on fuel pump module lock
ring. Reinstall fuel tank using proper procedure.
Fig. 34: Locating Fuel Pump Module Lock Ring, Locking Fingers &
Positioning Fuel Pump Module In Fuel Tank (Durango)
Courtesy of Chrysler Corp.
Removal (Ram Pickup)

fitting assembly out of the plastic shield. Use care not to damage
fill and vent fitting assembly. Disconnect fuel line from fuel
filter/fuel pressure regulator on fuel pump module using proper
procedure for fuel line disconnect fitting. See FUEL LINE DISCONNECT
FITTINGS. Fuel pump module is located on top of fuel tank. See Fig. 30
.
11) Disconnect electrical connector at fuel pump module.
Disconnect vapor hoses from rollover valves on top of fuel tank. See
Fig. 30 . Lower fuel tank from vehicle. Use care not to damage fill and
vent hose fitting assembly.
Installation
1) To install, reverse removal procedure. Install fuel lines
on fuel filter/fuel pressure regulator on fuel pump module using
proper procedure. See FUEL LINE DISCONNECT FITTINGS.
2) Ensure retaining tabs on fill and vent hose fitting
assembly fully engage the plastic shield. Tighten fuel tank strap
retaining nuts to specification. See TORQUE SPECIFICATIONS. Start
engine and check for fuel leaks.
FUEL RAIL & INJECTORS
Removal (Dakota 2.5L)
1) Release fuel pressure from fuel system. See FUEL SYSTEM
PRESSURE RELEASE. Ensure negative battery cable is disconnected.
2) Disconnect air inlet duct at throttle body for access to
fuel rail. Disconnect vent line from fuel damper at end of fuel rail
(if equipped).
3) Note electrical connector location on injectors for
installation reference. Disconnect electrical connectors at injectors.
Disconnect fuel line from fuel rail. See FUEL LINE AT FUEL RAIL.
Disconnect control cables at throttle body. Remove control cable
mounting bracket from intake manifold for access to fuel rail.
4) Remove fuel rail bolts. Ensure area around injectors and
intake manifold is clean. Using rocking motion, remove fuel rail with
injectors from intake manifold.
5) If removing injector from fuel rail, remove retaining clip
from fuel rail and injector. Retaining clip is located at top of
injector and fuel rail. Remove injector with "O" ring from fuel rail.
Installation
1) If installing injector on fuel rail, install NEW "O" ring
on injector. Coat "O" ring on injector with engine oil. Install
injector on fuel rail. Install retaining clip on injector and fuel
rail.
2) To install remaining components, reverse removal procedure
using NEW "O" ring at bottom of each injector. Coat "O" ring on
injector with engine oil before installing injectors and fuel rail.
3) Tighten fuel rail bolts to specification. See TORQUE
SPECIFICATIONS. Install fuel line on fuel rail using proper procedure.
See FUEL LINE AT FUEL RAIL. Start engine and check for leaks.
Removal (Dakota 3.9L, 5.2L & 5.9L, Durango, Ram Pickup 3.9L,
5.2L & 5.9L, Ram Van & Ram Wagon)
1) Release fuel pressure from fuel system. See FUEL SYSTEM
PRESSURE RELEASE. Ensure negative battery cable is disconnected.
2) On Ram Van and Ram Wagon, remove engine cover. On all
models, remove air cleaner. Remove throttle body from intake manifold.
See THROTTLE BODY. On A/C equipped models, remove A/C compressor-to-
intake manifold support brace at rear of A/C compressor.
3) On all models, note electrical connector location on
injectors for installation reference. Disconnect electrical connectors
at injectors. Disconnect any necessary wiring electrical connectors

for access to fuel rails and injectors.
CAUTION: Both fuel rails are serviced as an assembly. DO NOT attempt
to separate fuel rail from connecting fuel hose at rear of
each fuel rail. Connecting fuel hose does not use any form of
clamps on the hose. DO NOT use any clamps on connecting fuel
hose. When removing fuel rails with injectors, use care not
to bend connecting fuel hose.
4) Disconnect fuel line from fuel rail. See FUEL LINE AT FUEL
RAIL. Remove fuel rail bolts. Ensure area around injectors and intake
manifold is clean.
5) Using rocking motion, pull driver's side fuel rail with
injectors upward from intake manifold until injectors just clear
intake manifold. Repeat procedure on passenger's side fuel rail.
Remove fuel rails with injectors from intake manifold.
6) If removing injector from fuel rail, remove retaining clip
from fuel rail and injector. Retaining clip is located at top of
injector and fuel rail. Remove injector with "O" ring from fuel rail.
Installation
1) If installing injector on fuel rail, install NEW "O" ring
on injector. Coat "O" ring on injector with engine oil. Install
injector on fuel rail. Install retaining clip on injector and fuel
rail.
2) To install remaining components, reverse removal procedure
using NEW "O" ring at bottom of each injector. Coat "O" ring on
injector with engine oil before installing injectors and fuel rails.
3) Push passenger's side fuel rail and then driver's side
fuel rail downward until shoulder on each injector contacts the intake
manifold. Ensure all injectors are fully seated.
4) Tighten fuel rail bolts and throttle body bolts to
specification. See TORQUE SPECIFICATIONS. Install fuel line on fuel
rail using proper procedure. See FUEL LINE AT FUEL RAIL under FUEL
SYSTEM. Start engine and check for leaks.
Removal (Ram Pickup 8.0L)
1) Release fuel pressure from fuel system. See FUEL SYSTEM
PRESSURE RELEASE. Ensure negative battery cable is disconnected.
2) Remove throttle body from upper intake manifold. See
THROTTLE BODY. Remove ignition coils with mounting bracket for access
to fuel rails.
3) Upper intake manifold must be removed for servicing of
fuel rails and injectors. Remove generator-to-upper intake manifold
brace and A/C compressor-to-upper intake manifold brace. Remove
generator and A/C compressor if necessary for removal of upper intake
manifold.
4) Disconnect necessary vacuum lines and hoses for removal of
upper intake manifold. Remove bolts, upper intake manifold and gasket
from lower intake manifold.
5) Note electrical connector location on injectors for
installation reference. Disconnect electrical connectors at injectors.
Disconnect fuel line from fuel rail. See FUEL LINE AT FUEL RAIL.
6) Remove fuel rail bolts. Ensure area around injectors and
lower intake manifold is clean. Using rocking motion, pull driver's
side fuel rail with injectors upward from intake manifold until
injectors just clear intake manifold. Repeat procedure on passenger's
side fuel rail. Remove fuel rails with injectors from lower intake
manifold.
7) If removing injector from fuel rail, remove retaining clip
from fuel rail and injector. Retaining clip is located at top of
injector and fuel rail. Remove injector with "O" ring from fuel rail.