How to judge that the automobile throttle needs cleaning?

The most intuitive way is to disassemble the intake pipe and visually check whether there is too much carbon and oil in the throttle, so it is necessary to clean the throttle. If you don't want to dismantle it, you can only wait about 60 thousand kilometers, and then clean it when the engine idling is unstable and the shaking is irregular. The suggestion is to clean the throttle every 40 thousand kilometers or so, and don't wait until the idle speed shakes. Because idle chatter has become unstable, fuel consumption will definitely increase, because the engine computer has to constantly change the fuel injection and throttle opening to maintain the smooth operation of the engine. Therefore, the increase in fuel consumption also affects driving comfort.