Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Jeep Cherokee XJ 1997.1999-2001 Approved 1999 XJ Jeep Cherokee EXJ_14A
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XJ FUEL SYSTEM--2.5L DIESEL ENGINE 14 - 1
FUEL SYSTEM--2.5L DIESEL ENGINE
CONTENTS
page page
FUEL DELIVERY SYSTEM-- GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . 1
2.5L DIESEL ENGINE . . . . . . . . . . . . . . . . . . . . . 2
FUEL INJECTION SYSTEM--
2.5L DIESEL ENGINE . . . . . . . . . . . . . . . . . . . . 23
GENERAL INFORMATION
INDEX
page page
GENERAL INFORMATION FUEL SHUTDOWN SOLENOID . . . . . . . . . . . . . . 1
FUEL REQUIREMENTS--2.5L DIESEL . . . . . . . . . 1
GENERAL INFORMATION pedal. When the ignition (key) switch is OFF, the
solenoid is shut off and fuel flow is not allowed to the
FUEL SHUTDOWN SOLENOID fuel injection pump. When the key is placed in the
The fuel shutdown solenoid is controlled and ON or START positions, fuel supply is allowed at the
operated by the MSA. injection pump.
The fuel shutdown (shut-off) solenoid is used to
electrically shut off the diesel fuel supply to the high- FUEL REQUIREMENTS--2.5L DIESEL
pressure fuel injection pump. The solenoid is Premium quality diesel fuel with a minimum Cet-
mounted to the rear of the injection pump. ane rating of 50 or higher is required.
The solenoid controls starting and stopping of the
engine regardless of the position of the accelerator
14 - 2 FUEL SYSTEM--2.5L DIESEL ENGINE XJ
FUEL DELIVERY SYSTEM--2.5L DIESEL ENGINE
INDEX
page page
DESCRIPTION AND OPERATION FUEL SUPPLY RESTRICTIONS . . . . . . . . . . . . . 11
FUEL DRAIN TUBES . . . . . . . . . . . . . . . . . . . . . . 6 GENERAL INFORMATION . . . . . . . . . . . . . . . . . . 7
FUEL FILTER/WATER SEPARATOR . . . . . . . . . . . 3 HIGH-PRESSURE FUEL LINE LEAK TEST . . . . . 12
FUEL GAUGE SENDING UNIT . . . . . . . . . . . . . . . 3 VISUAL INSPECTION . . . . . . . . . . . . . . . . . . . . . . 7
FUEL HEATER . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 SERVICE PROCEDURES
FUEL HEATER RELAY . . . . . . . . . . . . . . . . . . . . . 7 AIR BLEED PROCEDURES . . . . . . . . . . . . . . . . 12
FUEL INJECTION PUMP . . . . . . . . . . . . . . . . . . . 4 FUEL INJECTION PUMP TIMING . . . . . . . . . . . . 13
FUEL INJECTORS . . . . . . . . . . . . . . . . . . . . . . . . 4 REMOVAL AND INSTALLATION
FUEL SHUTDOWN SOLENOID . . . . . . . . . . . . . . 3 ACCELERATOR PEDAL . . . . . . . . . . . . . . . . . . . 13
FUEL SYSTEM PRESSURE WARNING . . . . . . . . 2 AIR CLEANER ELEMENT . . . . . . . . . . . . . . . . . . 13
FUEL TANK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 FUEL DRAIN TUBES . . . . . . . . . . . . . . . . . . . . . 14
FUEL TANK MODULE . . . . . . . . . . . . . . . . . . . . . 3 FUEL FILTER/WATER SEPARATOR . . . . . . . . . . 14
FUEL TUBES/LINES/HOSES AND CLAMPS-- FUEL HEATER . . . . . . . . . . . . . . . . . . . . . . . . . . 15
LOW-PRESSURE TYPE . . . . . . . . . . . . . . . . . . 5 FUEL HEATER RELAY . . . . . . . . . . . . . . . . . . . . 15
HIGH-PRESSURE FUEL LINES . . . . . . . . . . . . . . 6 FUEL INJECTION PUMP . . . . . . . . . . . . . . . . . . 15
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . 2 FUEL INJECTORS . . . . . . . . . . . . . . . . . . . . . . . 19
QUICK-CONNECT FITTINGS--LOW PRESSURE FUEL LEVEL SENSOR . . . . . . . . . . . . . . . . . . . . 15
TYPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 FUEL RESERVOIR MODULE . . . . . . . . . . . . . . . 21
DIAGNOSIS AND TESTING FUEL TANK . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
AIR IN FUEL SYSTEM . . . . . . . . . . . . . . . . . . . . 10 HIGH-PRESSURE LINES . . . . . . . . . . . . . . . . . . 22
FUEL HEATER RELAY TEST . . . . . . . . . . . . . . . 10 SPECIFICATIONS
FUEL INJECTION PUMP TEST . . . . . . . . . . . . . . 11 FUEL INJECTOR FIRING SEQUENCE . . . . . . . . 22
FUEL INJECTOR / NEEDLE MOVEMENT FUEL SYSTEM PRESSURE . . . . . . . . . . . . . . . . 22
SENSOR TEST . . . . . . . . . . . . . . . . . . . . . . . . 11 FUEL TANK CAPACITY . . . . . . . . . . . . . . . . . . . 22
FUEL INJECTOR TEST . . . . . . . . . . . . . . . . . . . 10 IDLE SPEED . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
FUEL SHUTDOWN SOLENOID TEST . . . . . . . . . 12
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