Avio's valve cover is broken and it is easy to stall. What happened?

1. It may be caused by excessive carbon deposition in Aveo's throttle, idle motor, air intake and combustion chamber.

2. Due to too much carbon and dirt deposited in the air inlet, the cross-sectional area of the air passage changes, which makes the control unit unable to accurately control the idle intake air volume, resulting in the mixture being too rich or too thin, which makes the engine unable to start.

3. It is also possible that the fuel constant pressure performance of the electronic control system is poor and the fuel pressure is low, which leads to poor fuel injection atomization and difficult starting.