Engine fuel system obd2 software as one of the three subsystems of modern electronically controlled engine, and its direct impact on the work performance of the engine power, economy and emissions. Common cause of failure of the electronic control fuel system and check for automotive diagnostic repair reference.
Introduction
Engine fuel system's function is to supply a variety of operating conditions required for combustion of fuel in a timely manner, to the engine and its fuel tank, electric fuel pump, fuel filter, fuel pressure regulator, fuel injector and tubing and other components. Fuel by the fuel pump from the fuel tank pumped out, transported Car OBD2 Tools after impurities are filtered off by the fuel filter to the fuel distribution pipe, under the action of the fuel pressure regulator, so that a difference of internal gas pressure in the hydraulic pressure and the intake manifold is kept constant (about 0 about .25 MPa, the excess fuel flowing back into the fuel tank through the return pipe). The injector according to the instruction of the ECU to control the fuel injection timing and fuel injection duration, the injector ejecting fuel required in a timely manner.
The engine OBD2 Code Scanner fuel system failure phenomenon jitter performance of multi-engine, black smoke, and the lack of engine power, and does not start properly. Caused the above failure phenomenon largely due to the following situations: (1) electric fuel pump does not pump oil; (2) damage to the injector; (3) fuel pressure regulator damage; (4) The fuel filter is clogged; (5) tubing damage to the oil spill.
Common fault diagnosis of an electric fuel pump
1.1 common electric fuel pump failure
The most common failure of the electric fuel pump filter is clogged, the valve leakage and pump motor failure, oil pump due to wear and pump oil pressure failure is rare. Common car diagnosis tool failure of the fuel pump and electronically controlled engine shown in Table 1.
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