FUEL DELIVERY
TABLE OF CONTENTS
page
page
FUEL DELIVERY
DESCRIPTION
. . . . . . . . . . . . . . . . . . . . . . . . . . 6
OPERATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
STANDARD PROCEDURE
STANDARD PROCEDURE - DRAINING
FUEL TANK - DIESEL . . . . . . . . . . . . . . . . . . . 8
FUEL CONTAMINATION
. . . . . . . . . . . . . . . . . 8
SPECIFICATIONS
TORQUE
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
SPECIAL TOOLS
FUEL SYSTEM
. . . . . . . . . . . . . . . . . . . . . . . . 9
FUEL DRAIN TUBES
DIAGNOSIS AND TESTING - FUEL SUPPLY
RESTRICTIONS
. . . . . . . . . . . . . . . . . . . . . . . 10
FUEL FILTER
DESCRIPTION
. . . . . . . . . . . . . . . . . . . . . . . . . 10
REMOVAL
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
INSTALLATION
. . . . . . . . . . . . . . . . . . . . . . . . . 11
FUEL LINES
REMOVAL - HIGH PRESSURE LINES
. . . . . . . . 11
INSTALLATION - HIGH PRESSURE LINES
. . . . 12
FUEL RAIL PRESSURE SENSOR
DESCRIPTION
. . . . . . . . . . . . . . . . . . . . . . . . . 12
OPERATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . 12
REMOVAL
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
INSTALLATION
. . . . . . . . . . . . . . . . . . . . . . . . . 13
FUEL PUMP
DESCRIPTION
DESCRIPTION - HIGH PRESSURE PUMP
. . . 13
DESCRIPTION - LOW PRESSURE PUMP
. . . 13
OPERATION
OPERATION
. . . . . . . . . . . . . . . . . . . . . . . . . 13
OPERATION - LOW PRESSURE PUMP
. . . . . 16
REMOVAL - HIGH PRESSURE PUMP
. . . . . . . . 17
INSTALLATION - HIGH PRESSURE PUMP
. . . . 17
FUEL PUMP MODULE
DESCRIPTION
. . . . . . . . . . . . . . . . . . . . . . . . . 18
REMOVAL
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
INSTALLATION
. . . . . . . . . . . . . . . . . . . . . . . . . 20
FUEL QUANTITY CONTROL VALVE
DESCRIPTION
. . . . . . . . . . . . . . . . . . . . . . . . . 21
OPERATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . 21
REMOVAL
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
INSTALLATION
. . . . . . . . . . . . . . . . . . . . . . . . . 21
FUEL RAIL
DESCRIPTION
. . . . . . . . . . . . . . . . . . . . . . . . . 22
OPERATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . 22
REMOVAL
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
INSTALLATION
. . . . . . . . . . . . . . . . . . . . . . . . . 22
FUEL TANK
DESCRIPTION
. . . . . . . . . . . . . . . . . . . . . . . . . 23
REMOVAL
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
INSTALLATION
. . . . . . . . . . . . . . . . . . . . . . . . . 26
FUEL LEVEL SENDING UNIT / SENSOR
DESCRIPTION
. . . . . . . . . . . . . . . . . . . . . . . . . 28
REMOVAL
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
INSTALLATION
. . . . . . . . . . . . . . . . . . . . . . . . . 29
WATER IN FUEL SENSOR
DESCRIPTION
. . . . . . . . . . . . . . . . . . . . . . . . . 30
OPERATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . 30
FUEL DELIVERY
DESCRIPTION
Fuel is collected in the fuel tank. The fuel is drawn
in by the fuel pump module in the tank and distrib-
uted to the fuel filter and onto the high pressure fuel
pump. From there the fuel is distributed onto the
fuel rail and then to the various injectors. Any fuel
not needed flows back to the fuel tank through the
cooler lines and mixes with the cool fuel in the fuel
pump module bowl to be used again (Fig. 1).
14 - 6
FUEL DELIVERY
VA