Maintenance of fuel filter

The fuel filter is a controllable valve used to control the air entering the engine. After entering the intake manifold, it will be mixed with gasoline (but the design mixing parts of different vehicles are different) to become a combustible mixture, and participate in combustion work. (However, the mixing components designed for different models are different) Its function is to filter out harmful particles and water in the engine gas system, thus protecting the oil pump nozzle, cylinder liner, piston ring, etc., Reduce wear and avoid blockage.

The fuel filter takes a long time to use, and the maintenance and service cycle is also relatively long. The phenomenon after its failure is generally that the fuel pressure drops and the engine power drops. Because the installation position of the fuel filter is relatively hidden, it is often ignored by many friends. However, the fuel filter should be maintained in time.

Before the maintenance of the fuel filter, the fuel system must be depressurized.

The way to relieve the pressure of the fuel system is to pull out the fuel pump fuse (fuse) or fuel pump relay in the central junction box, and then start the engine until the engine automatically stops, and the fuel supply system has almost no pressure. However, when removing the fuel filter, it is necessary to pad a cloth under the removal part, and wipe off the leaked fuel in time to ensure safety.

In order to ensure that the engine can be started smoothly every time, the fuel system will always maintain a certain oil pressure. When the fuel filter is disassembled, the oil pressure will overflow from the loose joint, which is prone to fire, so the pressure must be relieved first.

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