The fault light is on, the jitter is increased, and the refueling is weak. How to return it?

The first one: the throttle position sensor, whose function is to detect the open angle of air temperature, determine the idle speed, that is, the acceleration and deceleration at full load, and realize the open state of the throttle, and the engine idle speed will fluctuate.

The second is the intake valve pressure sensor, which is used to provide engine load information, measure the intake pipe pressure and indirectly measure the intake air volume of the engine, and then convert the intake air volume into a signal through the internal circuit and provide it to the computer. If it fails, it will make the engine difficult to start and the idle speed unstable.

The third one: the temperature sensor, whose function is to convert the temperature into a pressure signal and send it to ECU for fuel injection correction. If something goes wrong with it, the engine will idle at low speed. It is easy to stall when driving or starting.

Fourthly, the closed-loop control of air-fuel ratio is realized by using the external sensor which provides the information of mixture concentration to correct the fuel injection quantity. If there is something wrong with it, it must be unstable idle speed and too much fuel.

Fifth, knock sensor, whose function is to provide knock information due to ignition correction. If there is a fault, no information can be provided before knocking occurs. So that knocking occurs.