Chrysler RAM TRUCK 2500 1994 Service Manual page 947

(5) Remove the plastic fuel tube from the filter/reg­
ulator by gently pulling downward. Remove filter/reg­
ulator from fuel pump module.
INSTALLATION
(1) Install a new clamp over the plastic fuel tube.
(2) Install filter/regulator to fuel tube. Rotate the
filter/regulator i n the fuel tube (line) until i t is
pointed to the drivers side of vehicle.
(3) Tighten line clamp to fuel line using special
Hose Clamp Pliers number C-4124 or equivalent
(Fig. 8). Do not use conventional side cutters to
tighten this type of clamp.
Fig. 8 Tightening Fuel Tube Clamp
(4) Slide the convoluted plastic tube (cover) up to
the bottom of filter/regulator and install snap ring
(Fig.
6).
(5) Press the filter/regulator (by hand) into the
rubber grommet. The assembly should be pointed to
the drivers side of the vehicle.
(6) Install fuel tank. Refer to Fuel Tanks i n this
group.
FUEL FILTER
Refer to Fuel Filter/Fuel Pressure Regulator for in­
formation.
FUEL SYSTEM PRESSURE RELEASE
ALL GAS POWERED
ENGINES
The fuel system is under constant fuel pressure
(even with the engine off).
WARNING: BECAUSE THE FUEL SYSTEM IS UN­
DER CONSTANT FUEL PRESSURE, THIS PRES­
SURE MUST BE RELEASED BEFORE SERVICING
ANY FUEL SUPPLY OR FUEL RETURN SYSTEM
COMPONENT. THIS DOES NOT APPLY TO THROT­
TLE BODY REMOVAL.
(1) Disconnect negative battery cable.
(2) Remove the fuel tank filler tube cap to release
fuel tank pressure.
(3) Remove (unscrew) the protective plastic cap
from the pressure test port on the fuel rail (Fig. 9).
On the 8.0L V-10 engine, this test port is located at
the front of the engine.
Fig. 9 Typical Fuel Pressure Test Port
WARNING: DO NOT A L L O W FUEL TO SPILL ONTO
THE ENGINE INTAKE OR EXHAUST MANIFOLDS.
PLACE SHOP TOWELS UNDER AND AROUND THE
PRESSURE PORT TO ABSORB FUEL WHEN THE
PRESSURE IS RELEASED FROM THE FUEL RAIL.
WARNING: WEAR PROPER EYE PROTECTION
WHEN RELEASING FUEL SYSTEM PRESSURE.
(4) Obtain the fuel pressure gauge/hose assembly
from fuel pressure gauge tool set 5069. Remove the
gauge from the hose.
(5) Place one end of hose (gauge end) into an ap­
proved gasoline container.
(6) Place a shop towel under the test port. On the
8.0L V-10 engine, this test port is located at the front
of the engine.
(7) To release fuel pressure, screw the other end of
hose onto the fuel pressure test port.
(8) After fuel pressure has been released, remove
the hose from the test port.
(9) Install protective cap to fuel test port.
FUEL SYSTEM PRESSURE TEST—GAS POWERED
ENGINES
Fuel systems on gas powered engines are equipped
with a fuel tank module mounted, combination fuel
filter/fuel pressure regulator (Fig. 10). The fuel pres­
sure regulator is a mechanical device that is not con­
trolled by the powertrain control module (PCM) or
engine vacuum.
With engine at idle speed, system fuel pressure
should be approximately 241-310 kPa (35-45 psi).