What are the symptoms of a problem with the Excelle intake pressure sensor?

There is a problem with the Excelle intake pressure sensor in the Pacific Auto Network, which will lead to unstable idle speed, poor acceleration, engine weakness and inability to run at high speed. ManifoldAbsolutePressureSensor (map)

It connects the intake manifold with a vacuum tube. With the different engine speed load, it senses the change of vacuum degree in the intake manifold, and then converts it from the change of sensor internal resistance to 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.

Principle of intake pressure sensor: 1. One is to change the resistance according to the pressure, so as to realize the voltage change at the detection end and achieve the purpose of testing and display, which is called remote transmission pressure gauge.

2. One is a pressure sensor with electrical signal output, which makes the sensor mechanically move according to the pressure, and the electromagnetic induction force changes, which is amplified and converted into a current signal of 4-20 mA to provide secondary instrument display and automatic control.