The loose leaf in the accelerator pedal of an automobile is shaking badly.

Abnormal, generally do not need to clean the oil circuit. Unless you add inferior oil or the wrong kind. Let's talk about why we need to clean the throttle first. What is a throttle? To put it bluntly, it is the valve that controls the intake of the engine. The traditional throttle is directly controlled by the throttle. The more you step on the throttle, the bigger the throttle will be and the larger the air intake of the engine will be. Nowadays, the electronic control system is popular. The driver steps on the accelerator to give the engine control computer a signal, and the engine control computer then controls the throttle opening. Because the throttle controls the intake air flow, it must be in direct contact with the air. Even with the protection of the air filter, the air contacted by the throttle cannot be completely cleaned, and the temperature in the engine compartment is high, so some pollutants will accumulate inside the throttle. Too many pollutants, also known as "dirty throttle". Unclean throttle will affect the accuracy and smoothness of engine intake. The most obvious problem is that idling may cause jitter or even flameout, and the throttle speed is not smooth. So clean the throttle. At present, the throttle is controlled by the engine computer. After cleaning the throttle (especially disassembling and washing), it is generally necessary to have a special diagnostic computer to re-match the throttle. If you don't do this matching, it will cause problems such as high idle speed, low idle speed or unstable jitter, and don't think that this is a problem that you can recover by yourself after driving for two days. If it is not necessary to re-match the throttle with a diagnostic computer, jitter is expected.