What effect does vacuum have on automobile air intake system?

It doesn't matter until the air filter alarm is displayed on the controller. If the intake vacuum is high, it only means that the air filter needs to be changed.

1, according to the pipeline design of the original car (basically the same as the breather pot with engine oil), the vacuum degree is about 0.045mpa.

2. If the ventilation pipe is changed into a straight row, and then the three ports in the figure are plugged, it can be seen that the vacuum degree is about 0.74mpa.