BMW's new 3-Series b48 cold car started to stall.

There are four main reasons for the flameout of vehicles: oil circuit, valve, circuit and sensor failure.

When the engine works normally, the oil pump pumps the fuel out of the oil tank, enters the distribution pipeline through the filter, and then is sprayed out by the oil nozzle to form an oil-gas mixture. In this process, the fuel pump and fuel injector are most prone to failure, followed by the filter and oil circuit blockage. Please focus on these two locations. If necessary, clean the oil circuit. In order to reduce the occurrence of this situation, when refueling, you should go to a regular gas station to add gasoline that meets the label, and at the same time, you should refuel in time and try not to let the amount of oil fall below the red line.

The throttle is blocked. The throttle is undoubtedly the most important component and the most prone to problems. In general, maintenance personnel will consider cleaning the throttle. However, if frequent cleaning of the throttle valve still cannot completely solve the flameout problem, it is generally a fault. In addition, check the vacuum pump to see if the air intake is normal.