Skoda Ming Rui 1.8t Engine Idle Jitter. There will be something wrong with that sensor

Engine jitter may be a problem with oxygen sensor or water temperature sensor, which needs to be checked one by one.

λ sensor

At present, the EFI vehicle is equipped with an oxygen sensor near the root of the engine exhaust pipe, which is an important parameter for the driving computer to control fuel injection. In closed-loop controlled vehicles, the minimum working temperature of the oxygen sensor is 370 degrees Celsius. If the temperature in the exhaust pipe doesn't work when the vehicle is just started, it will cause a temporary judgment error of the driving computer, and there will be errors in the control of oil-gas mixing and ignition time through the actuator, thus reducing the power output of the vehicle.

The malfunction of water temperature sensor leads to jitter.

For example, if the temperature of the engine during cold start is-10 degrees Celsius, but the sensor "tells" the computer that the temperature is 20 degrees Celsius now, then the computer will inject fuel at 20 degrees Celsius, and the fuel injection amount will naturally be less, and the power shortage will naturally appear, and the engine will shake.

There may also be the following problems.

Engine jitter caused by spark plug and cylinder pipeline

Engine jitter caused by oil-gas mixture ratio

The valve, throttle valve and idle valve have carbon deposits, which lead to jitter.

The different use of each cylinder causes the engine to shake.

I hope my answer can help you. If you have any questions, please leave a message.

Idle speed of internal combustion engine: http://www.neiranji.org/topics/idle