Tips: Why is there carbon deposit on the throttle?

Hello, with the use, the air filter element is poorly filtered and the pipeline is poorly sealed, which will lead to dust and carbon deposition on the throttle. A long time will lead to unstable idle speed and increased fuel consumption. It needs to be cleaned on time, generally once every 20,000 kilometers, and the air filter element needs to be replaced every 65,438 438+ 10/00,000 kilometers. Timely maintenance will ensure stable, comfortable and safe driving. Thank you.