Service manual

4G3 ENGINE - Fuel and Emission Parts
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6FU192C
6EM038
3EN015;
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6FUO714
INSPECTION
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INJECTORS
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(1) Using an ohmmeter (circuit tester), test for con&uity
between terminals of injector; the circuit should be closed.
If failure is detected, replace the injector.
Standard value: 13 - 16 n at 20°C (68°F)
EGR VALVE
(1) Check EGR valve for sticking or carbon deposits.
If such conditions exist clean or replace EGR valve.
(2) Connect a hand vacuum pump to the nipple of EGR valve
and plug the other nipple.
(3) Apply a vacuum of 500 mm Hg (19.7 in.Hg) to make sure
that vacuum is maintained. If there is a leak, replace the
EGR valve.
In addition, check the valve for its opening and closing
motion by applying and removing vacuum.
INSTALLATION SERVICE POINTS
I)A4 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) Install injector top end into the fuel pipe. Be careful not to
damage O-ring during installation.
r)64 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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