What are the symptoms of a broken fuel pump?

The fuel pump is the power source of gasoline from the fuel tank to the engine combustion chamber, which is usually built into the fuel tank and integrated with the oil level sensor and pressure regulator. The fuel pump pump has a large amount of oil, high oil pump pressure, stable oil supply pressure, low noise during operation and long service life.
A fuel pump is a component in a motor vehicle that transfers liquid from the fuel tank to the carburetor or fuel injector of the internal combustion engine. Carburetor engines typically use a low-pressure mechanical pump mounted outside the tank, while injector engines typically use an electric fuel pump mounted inside the tank. The fuel pressure needs to be within a certain specification range for the engine to operate normally. If the fuel pressure is too high, the engine will run rough and redundant, unable to burn all the fuel being pumped, making the engine inefficient and becoming a contaminant. If the pressure is too low, the engine may run poorly, catch fire or stall.
An electric fuel pump is a fuel device that continuously sucks fuel out of the tank and provides the specified pressure and flow to the fuel system. The electric fuel pump consists of three parts: pump body, DC motor and housing. Its basic principle is that the DC motor is energized to drive the rotor in the pump body shell to rotate at high speed, the section of the lower end of the rotor shaft is combined with the inner hole section of the impeller, so that when the rotor rotates, the impeller drives the impeller to rotate in the same direction through the rotor shaft, and the impeller causes vacuum low pressure in the oil inlet part during high-speed rotation, and then the filtered fuel is sucked in from the oil inlet of the pump cover, and the sucked fuel enters the inside of the pump casing after pressurization by the fuel pump impeller and then pressurizes out through the oil outlet to provide fuel with a certain pressure for the fuel system. The structure of the DC motor consists of a permanent magnet fixed on the inner wall of the pump housing, a rotor that can generate magnetic torque when energized, and a graphite carbon brush assembly mounted on the upper end of the pump housing. The carbon brush is in elastic contact with the commutator on the armature rotor, and its leads are connected to the plug-in wiring electrodes of the housing, and the two ends of the outside of the electric fuel pump casing are riveted with crimped edges to become a non-removable assembly.
What are the symptoms of a broken fuel pump? 1. The fuel supply system collapses and the vehicle cannot be started. 2. The oil supply pressure begins to decrease. 3. Weak acceleration, weird noises occur during driving. 4. It is difficult to start, it takes a long time to play the key. 5. Engine failure. Causes: 1. The oil is too low, and the fuel pump motor cannot be fully cooled and lubricated. 2. Poor oil quality and foreign matter. 3. The filter is not replaced for a long time.
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