Dodge Dakota (R1). Manual — part 578
After the injector has been removed, install it to a
bench–mount
injector
tester.
Refer
to
operating
instructions supplied with tester for procedures.
The opening pressure or “pop” pressure should be
15,000–15,800 kPa (2175–2291 psi). If the fuel injec-
tor needle valve is opening (“popping”) too early or
too late, replace the injector.
DIAGNOSIS AND TESTING - NEEDLE
MOVEMENT SENSOR
The needle movement sensor is used only on the
number–1 cylinder fuel injector (Fig. 12). It is not
used on the injectors for cylinders number 2, 3, or 4.
Testing the needle movement sensor requires the
use of a DRB Scan tool. Refer to the Powertrain
Diagnostic Procedures manual for additional infor-
mation.
REMOVAL
(1) Disconnect negative battery cable at battery.
(2) Thoroughly clean the area around the injector
with compressed air.
(3) Remove the fuel drain hoses (tubes) at each
injector (Fig. 13) being serviced. Each of these hoses
is slip–fit to the fitting on injector.
(4) Remove the high–pressure fuel line at injector
being removed. Refer to High–Pressure Fuel Lines in
this group for procedures.
(5) Remove the injector using special socket tool
number VM.1012B. When removing cylinder number
one injector, thread the wiring harness through the
access hole on the special socket (Fig. 14).
Fig. 12 Needle Movement Sensor Location
1 - NEEDLE MOVEMENT SENSOR
2 - FUEL INJECTOR (NUMBER 1 CYLINDER ONLY)
3 - COPPER WASHER
4 - SENSOR CONNECTOR
Fig. 13 Fuel Injector—Typical
1 - FUEL INJECTOR
2 - LINE FITTING
3 - HIGH-PRESSURE FUEL LINE
4 - FUEL DRAIN TUBES
Fig. 11 Typical Inspection of Fuel Injector
1 - FUEL INJECTOR
2 - LINE FITTING
3 - HIGH-PRESSURE FUEL LINE
4 - FUEL DRAIN TUBES
14a - 26
FUEL INJECTION
R1
FUEL INJECTOR (Continued)
(6) Remove and discard the copper washer (seal) at
bottom of injector (Fig. 10).
INSTALLATION
(1) Clean the injector threads in cylinder head.
(2) Install new copper washer (seal) to injector.
(3) Install injector to engine. Tighten to 70 N·m
(52 ft. lbs.) torque.
(4) Install high–pressure fuel lines. Refer to High–
Pressure Fuel Lines in this group for procedures.
(5) Install fuel drain hoses (tubes) to each injector.
Do not use clamps at fuel drain hoses.
(6) Connect negative battery cable to battery.
(7) Bleed the air from the high–pressure lines.
Refer to the Air Bleed Procedure section of this
group.
SPEED SENSOR
VEHICLE SPEED SENSOR TEST
To perform a test of the sensor and its related cir-
cuitry, refer to DRB scan tool.
Diagnostic Trouble Codes: (Refer to 25 - EMIS-
SIONS
CONTROL/ON-BOARD
DIAGNOSTICS
-
DESCRIPTION)
Fig. 14 Wiring Harness Through Socket
1 - FUEL INJECTOR
2 - WIRING HARNESS (NUMBER 1 CYLINDER ONLY)
3 - SPECIAL SOCKET
4 - FUEL INJECTOR SENSOR (NUMBER 1 CYLINDER ONLY)
R1
FUEL INJECTION
14a - 27
FUEL INJECTOR (Continued)
STEERING
TABLE OF CONTENTS
page
page
STEERING
POWER STEERING SYSTEM. . . . . . . . . . . . . . . 2
POWER STEERING FLOW AND PRESSURE . . . 4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
STEERING
DESCRIPTION
Power steering systems consist of:
• Steering column
• Rack and pinion steering gear
• Belt driven hydraulic steering pump
• Pump pressure and return hoses
• Oil Cooler
OPERATION
The steering column shaft is attached to the gear
pinion. The rotation of the pinion moves the gear
rack from side-to-side. This lateral action of the rack
pushes and pulls the tie rods to change the direction
of the front wheels.
Power assist is provided by an engine mounted
hydraulic pump, (Fig. 1) and (Fig. 2) the pump sup-
plies hydraulic fluid pressure to the steering gear.
Some vehicles are equipped with an oil cooler.
Fig. 1 Steering Pump, Gear And Oil Cooler - 5.2L & 5.9L
1 - HYDRAULIC PUMP
2 - RACK AND PINION GEAR
3 - OIL COOLER
Fig. 2 Steering Pump, Gear And Oil Cooler - 4.7L
1 - HYDRAULIC PUMP
2 - RACK AND PINION GEAR
3 - OIL COOLER
AN
STEERING
19 - 1
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