How Often Should the Fuel System Be Cleaned?

[LeEmma]

Fuel system cleaning is generally recommended every 2 years or approximately 60,000 kilometers. The steps for cleaning the fuel system are as follows: 1. Clean the fuel tank: Turn off the power, unplug the fuel sensor connector, remove and take out the electric fuel pump or fuel sensor, open the fuel tank cap, remove the filter screen, use a hose to extract the fuel from the tank, leaving about 5~8cm of fuel, then add a certain amount of ethanol or cleaning agent. Connect one end of a plastic hose to an air pump and insert the other end into the bottom of the fuel tank through the fuel tank opening. Use 3MPa air pressure to blow and clean, so that various impurities accumulated at the bottom of the tank, such as dirt, rust, and gum particles, are washed away by the agitated cleaning oil. 2. Clean the electric fuel pump: Use a carburetor cleaner to remove various impurities attached to the fuel pump. For mechanical fuel pumps that can be disassembled, the main cleaning parts are the inlet valve, outlet valve, and oil cup. For aged fuel pump diaphragms, replace them with new ones. For non-disassembled mechanical fuel pumps, replace them with new ones as needed. Replace the fuel sensor float in the tank if it affects the accuracy of the sensor. 3. Clean the fuel injector: Use a specialized carburetor cleaner to clean the oil passages, metering holes, oil surface chamber, atomizing nozzle, needle valve, etc. Replace the polymer plastic fuel float with a copper or stainless steel one. After cleaning, the carburetor should be clean and free of attached impurities. After reassembly, perform operational performance debugging to ensure the engine maintains stable idle speed, smooth transitions between high and low speeds, and no backfire or popping. 4. Clean the fuel filter: For detachable filters, use specialized cleaning oil to clean the oil cup and filter element. Polymer plastic filter elements must be replaced with ceramic or steel mesh nylon fabric filter elements. Replace disposable fuel filters. 5. Clean the electronic fuel injector: The electronic fuel injector of an electronic fuel injection vehicle should be cleaned on a specialized cleaning bench. Use specialized cleaning agents or carbon removers to thoroughly remove carbon particles and stains from the injector. After cleaning, verify the fuel injection quality before reassembly. 6. Clean the fuel supply lines and various filters: Use specialized cleaning oil or a cleaning machine for cleaning. 7. Check the fuel tank breather valve: The fuel tank's intake and exhaust should be unobstructed. If not, the breather valve must be cleared or replaced. 8. Test drive inspection: After cleaning, add ethanol gasoline to the vehicle and start it. Inspect all components of the fuel system to ensure there are no leaks, and check and adjust the operational performance of each part.