The main symptoms of the broken car air intake pressure sensor: weak acceleration, the engine can not start, the engine performance is abnormal, the idle speed is unstable, the engine intermittently stalling, the fuel consumption increases, the sensor internal line breaks or...
Resulting in the vehicle can not start or idling instability, acceleration is weak
1, the sensor internal line break or short circuit;
2, the sensor output signal can not change with the change of the vacuum degree of the intake pipe;
3, the voltage of the sensor output signal is too large or too small, its value deviates from the normal range, the connection line of the intake pipe pressure sensor and the computer is broken or short-circuited, and the output signal of the sensor is abnormal.
The intake pressure sensor is referred to as MAP, which is connected to the intake manifold with a vacuum tube. With the different speed load of the engine, the vacuum change in the intake manifold is induced, and then the resistance change in the sensor is converted into a voltage signal for the ECU to correct the injection amount and ignition timing Angle.