FUEL SYSTEM
TABLE OF CONTENTS
page page
FUEL DELIVERY SYSTEM....................1 FUEL INJECTION SYSTEM ..................25
FUEL DELIVERY SYSTEM
TABLE OF CONTENTS
page page
DESCRIPTION AND OPERATION
PCM VIN REPROGRAMMING ................1
FUEL DELIVERY SYSTEM ...................1
FUEL PUMP MODULE ......................2
FUEL PUMP..............................3
FUEL GAUGE SENDING UNIT ................3
FUEL FILTER/FUEL PRESSURE REGULATOR....3
FUEL TANK ..............................4
FUEL INJECTORS .........................4
FUEL INJECTOR RAIL/FUEL DAMPER—2.5L
ENGINE ...............................5
FUEL RAIL/FUEL DAMPER—4.0L ENGINE.......5
FUEL TANK FILLER TUBE CAP ...............6
FUEL TUBES/LINES/HOSES AND CLAMPS ......6
QUICK-CONNECT FITTINGS .................6
DIAGNOSIS AND TESTING
FUEL PUMP PRESSURE TEST ...............6
FUEL PUMP CAPACITY TEST ................7
FUEL PRESSURE LEAK DOWN TEST..........7
FUEL PUMP AMPERAGE TEST ...............8
FUEL GAUGE SENDING UNIT ...............10
FUEL INJECTOR TEST ....................10
SERVICE PROCEDURES
FUEL SYSTEM PRESSURE RELEASE
PROCEDURE ..........................10
QUICK-CONNECT FITTINGS ................10
REMOVAL AND INSTALLATION
FUEL FILTER/FUEL PRESSURE REGULATOR. . . 13
FUEL PUMP MODULE .....................14
FUEL PUMP INLET FILTER .................15
FUEL GAUGE SENDING UNIT ...............16
FUEL INJECTOR RAIL/FUEL DAMPER—2.5L
ENGINE ..............................16
FUEL INJECTOR RAIL/FUEL DAMPER—4.0L
ENGINE ..............................17
FUEL INJECTORS ........................19
FUEL TANK .............................19
FUEL TANK FILLER TUBE CAP ..............21
ACCELERATOR PEDAL ....................21
THROTTLE CABLE .......................22
SPECIFICATIONS
FUEL TANK CAPACITY ....................23
FUEL SYSTEM PRESSURE .................23
FUEL REQUIREMENTS ....................23
TORQUE CHART .........................24
DESCRIPTION AND OPERATION
PCM VIN REPROGRAMMING
OPERATION
USE THE DRB SCAN TOOL TO REPROGRAM
THE NEW POWERTRAIN CONTROL MODULE
(PCM) WITH THE VEHICLES ORIGINAL IDEN-
TIFICATION NUMBER (VIN) AND THE VEHI-
CLES ORIGINAL MILEAGE. IF THIS STEP IS
NOT DONE, A DIAGNOSTIC TROUBLE CODE
(DTC) MAY BE SET.
FUEL DELIVERY SYSTEM
DESCRIPTION
The fuel delivery system consists of:
• the fuel pump module containing the electric
fuel pump, fuel filter/fuel pressure regulator, fuel
gauge sending unit (fuel level sensor) and a separate
fuel filter located at bottom of pump module
XJ FUEL SYSTEM 14 - 1
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