Mitsubishi 4G1 Service Manual page 253

Injector
Fuel rail
INSPECTION
INJECTORS
(1) Using an ohmmeter (circuit tester), test for continuity
between terminals of injectors; the circuit should be
closed. If failure is detected, replace the injector.
Standard value: 13 - 16 IR at 20°C (68°F)
EGR VALVE
(1) Check the EGR valve for sticking or carbon deposits.
If such conditions exist, clean or replace the EGR valve.
(2) Connect a hand vacuum pump to the nipple of EGR valve
and plug other nipple.
(3) Apply a vacuum of 500 mmHg (19.7 in.Hg) to check that the
vacuum is retained. If there is a leak, replace the EGR valve.
(4) Check also that the valve opens and closes properly by
applying and releasing a vacuum.
INSTALLATION SERVICE POINTS
INJECTOR INSTALLATION
(1) Before installing an injector, the rubber O-ring must be
lubricated with a drop of clean engine oil to aid in
installation.
(2) Insert injector top end into the fuel rail. Be careful not to
damage the O-ring during installation.
FUEL PRESSURE REGULATOR INSTALLATION
(1) Before installing the pressure regulator, the O-ring must be
lubricated with a drop of clean engine oil to aid in
installation.
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