Chrysler neon 1997 Service Manual page 532

PL
DESCRIPTION AND OPERATION
ELECTRIC FUEL PUMP . . . . . . . . . . . . . . . . . . . 4
FUEL DELIVERY SYSTEM . . . . . . . . . . . . . . . . . 3
FUEL FILTER/FUEL PRESSURE REGULATOR . . 4
FUEL GAUGE SENDING UNIT . . . . . . . . . . . . . . 4
FUEL INJECTORS . . . . . . . . . . . . . . . . . . . . . . . 5
FUEL PUMP MODULE . . . . . . . . . . . . . . . . . . . . 3
FUEL RAIL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
FUEL TANK . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
PRESSURE-VACUUM FILLER CAP . . . . . . . . . . 5
QUICK-CONNECT FITTINGS . . . . . . . . . . . . . . . 5
ROLLOVER VALVES
DIAGNOSIS AND TESTING
FUEL INJECTORS . . . . . . . . . . . . . . . . . . . . . . . 8
FUEL LEVEL SENSOR . . . . . . . . . . . . . . . . . . . . 8
FUEL PUMP PRESSURE TEST . . . . . . . . . . . . . 6
SERVICE PROCEDURES
DRAINING FUEL TANK
FUEL SYSTEM PRESSURE RELEASE
PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . 10
DESCRIPTION AND OPERATION
FUEL DELIVERY SYSTEM
The fuel delivery system consists of: the electric
fuel pump, fuel filter/fuel pressure regulator, fuel
tubes/lines/hoses, fuel rail, fuel injectors, fuel tank,
accelerator pedal and throttle cable.
A fuel return system is used on all models (all
engines). Fuel is returned through the fuel pump
module and back into the fuel tank through the fuel
filter/fuel pressure regulator. A separate fuel return
line from the engine to the tank is no longer used
with any engine.
The fuel tank assembly consists of: the fuel tank,
filler tube, fuel gauge sending unit/electric fuel pump
module, a pressure relief/rollover valve and a pres-
sure-vacuum filler cap.
Also to be considered part of the fuel system is the
evaporation control system. This is designed to
reduce the emission of fuel vapors into the atmo-
sphere. The description and function of the Evapora-
tive Control System is found in Group 25, Emission
Control Systems.
FUEL PUMP MODULE
The fuel pump module is installed in the top of the
fuel tank (Fig. 1). The fuel pump module contains the
following:
FUEL DELIVERY SYSTEM
. . . . . . . . . . . . . . . . . . . . . 6
. . . . . . . . . . . . . . . . . . 10
FUEL FILTER/PRESSURE REGULATOR
INDEX
page
HOSES AND CLAMPS . . . . . . . . . . . . . . . . . . . 10
QUICK-CONNECT FITTINGS . . . . . . . . . . . . . . 11
REMOVAL AND INSTALLATION
ACCELERATOR PEDAL . . . . . . . . . . . . . . . . . . 18
AUTOMATIC SHUTDOWN RELAY
FUEL FILLER NECK . . . . . . . . . . . . . . . . . . . . . 17
FUEL FILLER TUBE ROLLOVER VALVE . . . . . . 17
FUEL FILTER / PRESSURE REGULATOR
FUEL INJECTORS . . . . . . . . . . . . . . . . . . . . . . 15
FUEL LEVEL SENSOR . . . . . . . . . . . . . . . . . . . 14
FUEL PUMP INLET STRAINER
FUEL PUMP MODULE . . . . . . . . . . . . . . . . . . . 12
FUEL PUMP RELAY . . . . . . . . . . . . . . . . . . . . . 12
FUEL TANK . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
THROTTLE CABLE—AUTOMATIC
TRANSMISSION . . . . . . . . . . . . . . . . . . . . . . 19
THROTTLE CABLE—MANUAL
TRANSMISSION . . . . . . . . . . . . . . . . . . . . . . 18
SPECIFICATIONS
TORQUE SPECIFICATION . . . . . . . . . . . . . . . . 20
• Electric fuel pump
• Fuel pump reservoir
• Inlet strainer
• Fuel filter/pressure regulator
• Fuel gauge sending unit
• Fuel supply line connection
The inlet strainer, fuel pressure regulator and fuel
level sensor are the only serviceable items. If the fuel
pump requires service, replace the fuel pump module.
FUEL RESERVOIR INLET STRAINER
FUEL SYSTEM
. . . . . . . . . . . . 14
Fig. 1 Fuel Pump Module
FUEL LEVEL SENSOR FLOAT
14 - 3
page
. . . . . . . . . . 12
. . . . 13