Maintenance Manual for J2 Sedan
Electronic Control System
of Engine
177
6. Inspection of Idling Speed
1) Conditions
Attention:
■
Check the regular items including spark plug, fuel injector and compression pressure of the
cylinder at beginning of inspection.
①
The engine coolant temperature is 80-95
.
℃
②
Lamps, electronic fan and all the accessories are turned off.
③
Shiftlever is at neutral position.
④
The steering wheel is at center (equipped with power steering system).
2) Connect the diagnosis apparatus.
3) Start engine and run it at the lowest idle speed.
4) Run engine for over 5s with speed of 2000-3000 rpm and then make the engine operate for 2min at
the idle speed.
5) Read idling speed (750±50r/min).
7. Fuel Pressure Test
Attention:
■
Before disconnecting the fuel pipeline, it is necessary to release the fuel pressure inside the fuel
pipeline to eliminate the danger.
■
The O-ring should always be used to keep the seal of the connecting joint of fuel hose.
■
Don’t operate the electrical system during inspection.
Note: Prepare a container under fuel pipe to avoid the fuel spillage when pipes disconnected.
1)
Dismount the nut at fuel pressure inspection port on the guide rail of fuel injector.
2)
Connect fuel pressure gauge.
3)
With ignition switch at “ON” position, check for fuel leakage.
4)
With engine running with idling speed, check for the fuel leakage.
5)
Take down reading of fuel pressure gauge.
■
Fuel pressure: 350KPa
Attention:
■
Don’t check fuel pressure with system operating.
