The electromagnetic injector is composed of a set of electromagnetic coil, armature switch, injection needle and valve seat. Due to their high working frequency (for example, when the engine speed is 6000r/min, they are repeatedly turned on and off 3000 times or 6000 times per minute), over a long period of time, sometimes because the electromagnetic coil does not work well, the needle valve is stuck and no fuel is injected. , resulting in poor or no atomization of gasoline, making the engine work poorly or fail to work. If the fault is found when the car runs 10,000 to 15,000 kilometers, you can focus on checking the working conditions of the fuel injector and spark plug. When the cold start is difficult, it is necessary to focus on checking the working condition of the fuel injector and the related connection circuit, because the fuel injector does not work well or does not work during the cold start, which directly affects the start-up enrichment effect. the
The electric fuel pump works when there is no oil or the oil quality is too poor, which will cause the electric fuel pump to be worn or damaged. In addition, the electric fuel pump is controlled by the micro switch on the air flow sensor. If the switch does not work well and moves slowly, it will cause insufficient fuel supply to the fuel pump and affect the starting and acceleration performance of the car.