How many kilometers do you need to clean the fuel injectors and throttle body?

[McCaden]

Cleaning time for throttle body and fuel injectors: If the car is in good condition and the fuel quality is good, it can be cleaned every 40,000-60,000 kilometers. The car fuel injector is a simple solenoid valve. After the suction force is generated, the needle valve is sucked up, the injection hole is opened, and the fuel is sprayed out at high speed through the annular gap between the needle valve head and the injection hole to form a mist. If the fuel injector is blocked, it will directly affect the performance of the car. The following are the performance of the car when the fuel injector is blocked: 1. The engine noise becomes louder, especially in low gears. 2. The throttle response is not sensitive, the driving is not smooth, there is a lag phenomenon after stepping on the throttle, and the engine speed rises slowly after stepping on the throttle in neutral. 3. Idle speed jitter, especially easy to jitter when starting, and slight cylinder misfire when shifting up at low gears and low speeds.