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)