Function of automobile vacuum gauge

Used to check the vacuum behind the automobile throttle.

The vacuum behind the throttle can reflect the relationship between engine speed and engine load, and the driver can judge the working condition of the engine according to the signal of this table.

Of course, this watch is used for car maintenance. Check whether the engine is running normally and whether the intake and exhaust are smooth. Whether there is air leakage behind the engine throttle when idling, etc.