Why does the car shake and stall frequently at idle when warmed up?

[LeTyler]

The reasons for unstable idle, shaking, and stalling are as follows: 1. Severe engine carbon deposits. The most common cause of car shaking is a dirty throttle body or excessive carbon buildup in the fuel injectors. 2. Ignition system issues. Check the condition of the spark plugs, high-voltage wires, and ignition coils. Poor ignition system performance or weak spark plug firing can also lead to such symptoms. 3. Unstable fuel pressure. If you have already cleaned the engine carbon deposits, cleaned the throttle body, replaced the gaskets and spark plugs, but still experience shaking at idle, it is recommended to visit a 4S shop to check the fuel supply pressure and the intake pressure sensor. Abnormal fuel pump pressure or incorrect readings and poor performance of the intake pressure sensor can cause the car to shake. 4. Aging engine components. Car shaking can also be related to worn engine mounts (also known as engine mounts). Engine mounts are essentially the shock absorption system of the engine, responsible for absorbing minor vibrations during operation. If the engine mounts are faulty, these vibrations can be transmitted to the steering wheel and the interior, causing shaking at idle.