Turn off the engine without stepping on the accelerator. Is the computer board broken?

The reasons are ignition system, air intake system and fuel system. This will happen if most of the components in these three systems are damaged. The most common reasons are the damage of throttle or idle speed control valve, insufficient oil supply of gasoline pump and air leakage of intake system. After the driver steps on the accelerator pedal, the throttle opening will increase and the amount of air entering the engine will also increase. When the sensor detects that the amount of air entering the engine is empty, it will feed back the signal to ecu. After the treatment, the electronic control unit will control the fuel injection system to increase the fuel injection quantity, thus increasing the engine speed. When the engine is idling, there is an idling control valve on the throttle, which can keep the throttle open to some extent. Only in this way can a small amount of air enter the engine to participate in combustion. If the idle control valve is damaged, the throttle will not open. If you don't step on the accelerator, it will stall. At this time, air cannot enter the engine to participate in combustion, so the engine will stall. When replacing the throttle, you must choose the original accessories, which are more reliable and durable. And when you use the car, you must maintain it regularly. Daily maintenance is very important for cars. Timely maintenance can keep the car in good condition. In good condition.