Signs of a broken car gasoline pump. What are the symptoms of a broken car gasoline pump?
Signs of a bad car gasoline pump:
1. Inability to accelerate, and a sense of frustration when refueling in a hurry;
2. It is difficult to start when starting, and it takes a long time. Time to turn the key;
3. Abnormal noise, buzzing noise while driving;
4. The engine fault light is on;
5. Engine shaking .
Factors causing damage to gasoline pumps:
1. Poor oil quality
When the oil quality is poor, the fuel tank will be filled with various impurities or foreign matter. Although the oil pump has a layer of filter to filter the gasoline, it can only block out large particles of impurities. Small particles of impurities are sucked into the oil pump motor, causing damage to the oil pump in the long run.
2. Not refueling in time
Some people have the habit of waiting until the oil light comes on before refueling. You must know that always doing so will cause the oil pump to be in a smaller position and not get sufficient oil. Cooling and lubrication will cause the electric pump motor to overheat and stall.
3. The gasoline filter has not been replaced for a long time, and the fuel supply system of the gasoline filter is seriously blocked, causing the oil pump to have difficulty pumping oil. The long-term high load condition causes damage to the gasoline pump.
Extended information
Methods for testing fuel pump performance
Some hard faults of automobile fuel pumps (such as failure to work, etc.) are easier to judge, but the Some intermittent soft faults are difficult to diagnose. In this regard, a car digital multimeter can be used to detect the operating current of the fuel pump to judge its performance. The specific method is as follows.
1. Place the automotive digital multimeter in the current setting, press the function key (SELECT) to adjust to the direct current (DC) setting, and then connect the two test leads in series to the connection line of the fuel pump being tested.
2. Start the engine, and when the fuel pump is working, press the dynamic recording key (MAX/MIN) of the car digital multimeter to automatically record the maximum and minimum current values when the fuel pump is working. . By comparing the detected data with normal values, the cause of the failure can be determined.
Safety Precautions for Fuel Pump Fault Detection
1. Old Fuel Pump
When troubleshooting the fuel pump of a vehicle that has been used for a long time, this type of The fuel pump cannot be dry tested. Because when the fuel pump is removed, there is fuel remaining in the pump casing. Therefore, during the power-on test, once the brush and commutator are in poor contact, sparks will ignite the fuel in the pump casing and cause an explosion. The consequences Very serious.
2. New fuel pump
Dry test is not allowed for newly replaced fuel pumps. Because the oil pump motor is sealed in the pump casing, the heat generated during dry testing cannot be dissipated. Once the armature overheats, it will burn the motor. Therefore, the fuel pump must be immersed in fuel for testing.
Baidu Encyclopedia-Fuel Pump