How often should fuel injectors be cleaned?
2 Answers
Fuel injectors should be cleaned every two years or every 40,000 to 60,000 kilometers. A fuel injector is essentially a normally closed valve, meaning the valve remains closed when there is no input control signal. Conversely, a normally open valve stays open when there is no input control signal. The opening and closing of the valve is controlled by the up-and-down movement of a valve needle. When the ECU issues a fuel injection command, the voltage signal causes current to flow through the coil inside the injector, generating a magnetic field that lifts the valve needle, opening the valve to allow fuel to spray out through the injection hole. The advantage of fuel injection is the precise control of fuel supply, ensuring the engine maintains the correct air-fuel ratio under any condition. This not only keeps the engine running smoothly but also ensures that exhaust emissions comply with environmental regulations.
When I usually repair cars, I see that fuel injectors can easily accumulate carbon deposits and get clogged if not cleaned regularly, which affects fuel atomization. This leads to poor engine performance and higher fuel consumption. Generally, it's recommended to clean them every 20,000 to 30,000 kilometers or every two years, depending on driving habits and conditions. If you frequently drive on highways and use high-quality gasoline, they can last longer. However, if you often drive in congested urban areas, deposits build up quickly, so it's best to check them in advance. As for cleaning methods, some car owners buy cleaning agents and DIY, but you need to be careful to avoid damaging the parts. I recommend going to a professional shop for equipment-assisted cleaning—it's safer and more thorough. Clean fuel injectors improve engine efficiency and can save you a lot on fuel costs.
