How Often Should the Throttle Body Be Cleaned?
2 Answers
The throttle body generally needs to be cleaned every 20,000 to 40,000 kilometers. The throttle body is a controllable valve that regulates the airflow entering the engine. After the air enters the intake manifold, it mixes with gasoline to form a combustible mixture, which then burns to generate power. The throttle body is connected to the air filter at the top and the engine block at the bottom, often referred to as the "throat" of the car engine. The cleaning method for the throttle body is as follows: 1. Use a flat-head screwdriver to loosen the fastening screws of the metal clamp connecting the air filter and the throttle body, separating the air filter cover from the throttle body; 2. For cleaning an electronic throttle body, it is best to have two people operate—one responsible for pressing the accelerator and the other for cleaning. Spray carburetor cleaner onto a clean cloth and then carefully wipe the throttle body clean; 3. After cleaning, check whether the throttle body is thoroughly cleaned and whether it can open and close freely. Then reconnect the air filter to the throttle body, ensuring a proper seal, and tighten the screws of the metal clamp. If any sensor connectors were removed, reattach them.
Throttle body cleaning is something I think should be decided case by case based on years of driving experience. Generally, cleaning every 10,000 to 20,000 kilometers is appropriate, but it also depends on driving conditions and habits. For example, living in the city with poor air quality and frequent traffic jams leads to faster carbon buildup, so I clean it every 8,000 kilometers to ensure the idle doesn’t shake. Signs like idle trembling or a sudden increase in fuel consumption indicate it’s time for cleaning. You can use a cleaning spray yourself, but most recommend going to a professional shop to avoid damaging parts. Check during regular maintenance—don’t skip this step, as severe carbon buildup can affect engine smoothness, shorten the car’s lifespan, and reduce fuel efficiency.
