The intake pressure of Jinbei sea lion is too low.

Intake pressure sensing signal circuit voltage is too low. Explain whether the signal circuit of intake manifold pressure sensor is caused by short circuit to ground, open circuit or damage of intake pressure sensor. It is necessary to repair related circuits and replace the damaged intake pressure sensor.

The intake pressure sensor is used to detect the intake air of the engine and control the basic fuel injection quantity. If this sensor is broken, and the computer can't receive the intake air, the mixture will be too thick and too thin, leading to black smoke, incomplete combustion, and even shooting of the exhaust pipe. The mixture will lead to insufficient fuel, backfire, insufficient power, weak acceleration and even difficult start. When the car is idling, the intake pressure 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. With the different engine speed load, it senses the change of vacuum degree in the intake manifold, and then converts the change of sensor internal resistance into a voltage signal for ECU to correct 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 ECU. The ECU controls the basic fuel injection quantity according to the signal voltage.