(5) Install fuel pump electrical connector into hole
in the body.
(6) Connect the purge and vent lines.
(7) Raise tank into position and install tank
straps.
(8) Install the fuel filler tube and tighten the
clamp.
(9) Reposition the stabilizer bar and install bolts.
(10) Lower vehicle.
(11) Connect the fuel pump electrical connector
that is in the rear seat.
(12) Install the rear seat.
(13) Connect the battery cable.
(14) Fill fuel tank. Use the DRB IIIt scan tool to
pressurize the fuel system. Check for leaks.
FUEL PUMP
DESCRIPTION
The electric fuel pump is located in and is part of
the fuel pump module. It is a positive displacement,
gerotor type, immersible pump with a permanent
magnet electric motor. The fuel pump module is sus-
pended in fuel in the fuel tank.
OPERATION
The pump draws fuel through a strainer and
pushes it through the motor to the outlet. The pump
contains a check valve. The valve, in the pump out-
let, maintains pump pressure during engine off con-
ditions, for a short while. It is normal for fuel
pressure to drop to zero after cooldown. The fuel
pump relay provides voltage to the fuel pump. The
fuel pump has a maximum deadheaded pressure out-
put of approximately 880 kPa (130 psi). The regula-
tor adjusts fuel system pressure to approximately
400 kpa ±34 kpa (58 psi ± 5 psi).
NOTE: Checkvalve maintains volume of fuel in the
rail and lines, not pressure.
FUEL PUMP MODULE
DESCRIPTION
The fuel pump module contains the fuel pump, fuel
reservoir, level sensor, inlet strainer, and fuel pres-
sure regulator/filter (Fig. 11).
OPERATION
The Chrysler fuel pump modul is an in-tank unit
with an integral fuel level sensor and pressure regu-
lator (Fig. 12). The pump is driven by a 12 volt DC
motor any time the fuel pump relay is energized. Ser-
viceable components on the module include:
• Inlet strainer
• Fuel level sensor
• Fuel Filter/Pressure regulator
The pump draws fuel through a strainer and
pushes it through the motor to the outlet. The pump
contains two check valves. One valve relieves inter-
nal fuel pump pressure and regulates maximum
pump output. The second valve, in the pump outlet,
maintains pump pressure during engine off condi-
tions.
The fuel systems use either a positive displace-
ment, gerotor, with a permanent magnet electric
motor. This fuel system does not contain the tradi-
tional fuel return lines. The regulator contains a cal-
ibrated spring which forces a diaphragm against the
Fig. 10 Fuel Pressure Regulator Locking Tab
1 - FUEL FILTER/PRESSURE REGULATOR
2 - SPRING TAB
3 - LOCATING SLOT
Fig. 11 Fuel Pump Module - Typical
14 - 8 FUEL DELIVERY LH
FUEL PRESSURE REGULATOR (Continued)
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