How normal is the intake pressure of the car?

The intake pressure sensor is used to detect the intake air of the engine and control the basic fuel injection quantity. If the sensor is broken and the computer can't receive the intake air, it will cause the mixture to be too rich and too thin, produce black smoke, burn incompletely and even blow up the exhaust pipe. If the mixture is too thin, it will lead to insufficient fuel, backfire, insufficient power, weak acceleration and even difficult starting. When the vehicle is idling, the intake pressure of the vehicle is generally between 27 and 30 kPa.

Intake air pressure sensor. Map for short. It is connected to the intake manifold through a vacuum tube. Under different engine speed loads, it senses the real air change in the intake manifold, and then converts the change of the internal resistance of the sensor into a voltage signal, and the power supply control unit corrects the fuel injection quantity and ignition timing angle. The intake pressure sensor detects the absolute pressure of the intake manifold behind the throttle. It detects the change of absolute pressure in the manifold according to the engine speed and load, and then converts it into signal voltage and sends it to the engine control unit (ECU), which controls the basic fuel injection quantity according to the signal voltage. There are many kinds of intake pressure sensors, such as pressure sensitive and capacitive. Because of the advantages of fast response time, high detection accuracy, small size and flexible installation, varistor is widely used in D-type fuel injection system.

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