Yun Qi 1 Idle speed is unstable, and sometimes it will spontaneously ignite. When it is ignited, it is not easy to cause a fire.

As for the problem of unstable idle speed when the car is cold and running at low speed, it may be caused by excessive carbon deposition on the accelerator and idle motor. It may also be caused by the temperature of the water temperature sensor. You should focus on checking whether there is carbon deposit in the throttle, and at the same time, it is best to use a diagnostic computer to detect whether there is a fault code in the engine. If there is, you can judge the specific cause of the fault according to the fault code. Also, the problem of oil accumulation and flameout you mentioned may be caused by excessive carbon accumulation in throttle, idle motor, intake valve, intake pipe and combustion chamber, fuel nozzle and spark plug. It may also be caused by sensor failure. Because the engine is controlled by ECU, when shifting gears, refueling and receiving oil, the computer will continuously collect signals from various sensors to control the fuel injection quantity of the engine. Once there is a problem, the computer program will be disordered, resulting in low idle speed, unstable idle speed, oil collection and flameout. In addition, it is necessary to pay attention to check whether there is any leakage in the fuel injector, which leads to the fuel injector still in the fuel supply state after the throttle valve is closed, which leads to too much mixed gas when driving at low speed, which leads to unstable idle speed and serious flameout after fuel is turned off. According to the above analysis, I suggest you go to the 4S shop for on-site inspection.