What is the problem of idling body jitter after hot car?

Vehicle judder is a common phenomenon at low speed and idle speed. When idling, the engine jitter is the most serious. If it is sudden jitter, you can consider readjusting the engine fixing bolts first. Secondly, the common reasons are dirty throttle body, atomization of fuel nozzle or poor ignition of spark plug. You can check whether the ECU has any error codes and whether the corresponding water temperature sensor and throttle opening sensor are working normally. There are two reasons for idling car body shaking after hot car: 1. The most common reason is that the throttle is dirty or the throttle fault causes the body to shake at idle speed. The main cause of throttle pollution is carbon deposition at the joint between throttle disc shaft and throttle body, and the throttle opening is not accurate enough, which leads to idle sloshing. 2. So, you can wash the throttle first. If it doesn't shake after washing, it's because the throttle is dirty. If it still shakes after cleaning, the throttle assembly may be damaged. It is the general who needs to change the throttle. In addition, it should be noted that the vehicle is now using an electronic throttle, so after cleaning the throttle, it is necessary to re-learn the idle speed.