4. FUEL INJECTION SYSTEM
4-11
Fuel Lines
System Description:
1. All sensors’ signals sent to the ECU firstly after the electrical fuel pump inside the fuel tank key-on.
Then, ECU controls the fuel pump relay so let the pump operate. If the engine did not start for
2~3 seconds, then the fuel pump will be turned off to save power. The pressure regulator is to
maintain the fuel pressure in 2.5bar, and the fuel injector inject properly fuel quantity according to
running conditions and environmental corrective coefficient. When key-off or engine stopped, the
fuel pump stops operating.
2. The fuel filter is to filter foreign materials so it has to be replaced regularly.
3. Do not let the starting motor keep running when the engine can not be started in smoothly to
cause battery voltage insufficient (under 8V) and the pump will not be operated. The corrective
method is to start the engine by connecting a new battery or with foot-lever.
Battery
ECU
Fuel filter
Fuel injector
Fuel tank
Vacuum hose
Fuel pump & pressure regulator
