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fuel level gauge needle shaking
Reasons for the fuel needle on the car dashboard to shake back and forth:
1. The fuel level sensor is faulty. The car fuel level sensor can float on the surface of the fuel layer. Using the principle of leverage, the other end of the float is a potentiometer. The fuel volume determines the height of the float. Different potentials, displayed on the instrument panel;
Solution: check and maintain the fuel level sensor, if damaged, replace it;
2. The resistance signal of the fuel level sensor is faulty. It may be polluted by fuel during actual use, or after long-term use, the sensor has unclear signal reception. In this case, it is very likely that a wrong signal will be sent to the dashboard, resulting in no way to accurately judge the remaining fuel volume of the vehicle;
Solution: It is recommended that the car owner go to a 4S shop or a repair shop for repairs. The car owner cannot solve this problem personally or may easily cause new problems in the car, causing unnecessary losses;
3.During the driving process of the car, there are often road bumps. At this time, the sensor may have different fuel levels. At this time, the pointer of the fuel gauge will swing back and forth, which is a relatively common phenomenon.In general, it is normal for the fuel pressure gauge to remain within the pressure range of 150 to 350 kPa: 1. The pointer of the fuel pressure gauge is normal between 3 and 5. When the engine is working, the fuelpressure is generally maintained within the pressure range of 150~350 kPa; If the pressure value indicated by the fuelpressure gauge is less than 98kPa, it can be considered that the fuelpressure is too low and should be stopped immediately for inspection; 3. Otherwise, it is easy to cause excessive wear of the parts and even major mechanical failures.
The sensor of the engine fuel pressure gauge is a piezo resistive sensor. Secure with threads on the engine fuel pipe. Due to high engine fuel pressure. Pushing the contact piece to move on the resistance will affect the amount of current flowing through the instrument to the ground by changing the resistance value. Drive the pointer to swing. Because sending. The engine fuel pressure has a certain pressure range, and the discharge is clear and clear. Nowadays, many car engine fuel pressure gauges are represented by indicator lights.
Stable performance is the preferred factor for long-term use of automotive fuel sensors. The fuel quantity sensor uses small wire diameter, high positive value, and densely arranged wire wound positive electrodes. It has the characteristics of stable performance, reliable structure, and high resolution.
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