What does the greater the vacuum mean? vehicle maintenance and repair

The greater the vacuum, the greater the related suction of the engine. In terms of automobile maintenance, the related vacuum degree of the vehicle will also change with the opening of the throttle. First, car maintenance. The vacuum response is the suction of the intake manifold when the engine is working, because the lower the intake manifold pressure, the greater the vacuum and the greater the intake manifold suction. If the engine reports a fault, the fault code is: absolute pressure of throttle opening, and the comparison is: excessive pressure. The absolute pressure here refers to the pressure of the intake manifold, and the high pressure of the intake pipe means that the vacuum degree is small, that is, the suction of the intake manifold is small. Secondly, when the intake manifold leaks, the pressure inside the intake manifold will change. Because the intake air does not follow the normal channel, the pressure detection will become abnormal, and it often happens that the mixture is too thin and the intake air volume increases too much. Because the fuel injection quantity is mainly determined by the air intake, if there is more gas, the fuel injection quantity will increase. To sum it up. The test and standard value of engine-related vacuum degree are also the basic data to judge the engine-related faults of vehicles.