The general fuel water separator price is about 400 yuan:
1. The fuel water separator is mainly based on the density difference between water and fuel, and uses the principle of gravity sedimentation to remove impurities and water. There are also separation elements such as diffusion cones and filters inside;
2. The fuel water separator also has other functions, such as pre-heating the fuel to prevent wax formation, filtering impurities, etc.;
3. The fuel water separator is a kind of fuel filter. Its main function is to remove the water in the diesel fuel, so as to reduce the failure of the fuel injector and prolong the service life of the engine;
4. The fuel water separator can only separate the oil and water of the fuel oil, and separate the water in the oil, which has a certain effect on the engine to improve the burning oil.

The fuel filter contains the gasoline filter. There are three types of fuel filters, namely diesel filter, gasoline filter and natural gas filter, which are connected in series on the pipeline between the fuel pump and the inlet of the throttle body. The function is to prevent particles, water and impurities in the fuel, and to ensure that the precise components of the fuel system are protected from wear and other damage. How to replace the fuel filter:
1. Park the car on a solid surface and cut off the power supply;
2. Reduce the air pressure of the fuel system and loosen the valve cover to reduce the air pressure of the fuel system;
3. The location of the fuel filter is generally under the engine or under the fuel tank. If necessary, use a jack to lift the car and disconnect the fuel line from the fuel filter;
4. Remove the mounting bolts of the fuel filter, and then the fuel filter can be removed;
5. Compare whether the new fuel filter is the same as the removed model. After confirming, install the new fuel filter. Pay attention to the direction to ensure that it points to the engine. After confirmation, the filter fixing bolts can be installed.