2003 JEEP GRAND CHEROKEE Vacuum system

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Page 1380 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual (6) Remove accessory drive belt (Refer to 7 -
COOLING/ACCESSORY DRIVE/DRIVE BELTS -
REMOVAL).
(7) Disconnect generator electrical connections.
(8) Unbolt the generator and move it away from
the intake

Page 1421 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual FUEL DELIVERY
DESCRIPTION
The fuel delivery system consists of:
²the fuel pump module containing the electric
fuel pump, fuel gauge sending unit (fuel level sensor)
and a separate fuel filter located

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JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual SPECIAL TOOLS
FUEL SYSTEM
FUEL FILTER/PRESSURE
REGULATOR
DESCRIPTION
The combination fuel filter/pressure regulator is
located in front of the fuel tank and above the rear
axle (Fig. 3). It is transve

Page 1430 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual (19) Disconnect test leads from relay cavities
immediately after testing.
FUEL PUMP PRESSURE TEST
Use this test in conjunction with other fuel system
tests. Refer to the Fuel Pump Capacity Test, Fuel

Page 1435 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual CAUTION: The left and right fuel rails are replaced
as an assembly. Do not attempt to separate rail
halves at connector tube (Fig. 22). Due to design of
tube, it does not use any clamps. Never attempt

Page 1438 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual (14) Install air tube (or duct) at top of throttle
body.
(15) Install fuel tank cap.
(16) Connect negative battery cable to battery.
(17) Start engine and check for fuel leaks.
FUEL TANK
DESCRIPTION
T

Page 1451 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual FUEL INJECTION
DIAGNOSIS AND TESTING
VISUAL INSPECTION
A visual inspection for loose, disconnected or incor-
rectly routed wires, vacuum lines and hoses should
be made. This should be done before atte

Page 1453 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual (8) Inspect system body grounds for loose or dirty
connections. Refer to Group 8, Wiring for ground
locations.
(9) Verify crankcase ventilation (CCV) operation.
Refer to Emission Control System for ad