my tachometer is jumping

• 2022-06-13

The red line area of the tachometer represents the maximum speed peak, commonly known as the "red area". This area will not cause damage to the engine in a short time, but long-term use will affect the engine power and engine life. The most intuitive reflection is fuel consumption. Because the wear of the engine is mainly caused by high speed and high temperature, the pressure between various parts of the engine will be very large under this state, which is generally used to test the vehicle limit.

If the engine tachometer is an original factory, the red warning area shown on the table is a dangerous area, which means that the engine will be in a state of over power operation. Theoretically, it can be achieved (no-load or clutch status can be achieved). However, due to various resistance when riding, it is difficult to achieve. Even if reached, it will be accompanied by a great roar. If it is in the high gear, the locomotive will also be in the limit speed state, and will also reach the failure state of locomotive safety performance. And the long-term over power output of the engine will greatly reduce the service life.

The reason why my tachometer is jumping is that the car's oxygen sensor fails. The solution is: if the oxygen sensor of the car breaks down, you need to go to the 4S store or repair shop in time to repair or replace the oxygen sensor of the car, so as to solve the up and down shaking of the tachometer. The pointer of the tachometer moves up and down when the new car starts cold. This is because the engine just starts unsteadily and the water temperature does not rise.

The phenomenon you mentioned is that the tachometer is jumping up and down. The actual situation should be that the engine is shaking, that is, the work is not good and the speed is unstable. The pointer of the tachometer vibrates up and down, which is a sign of unstable idle speed. If you haven't done the maintenance for a long time, you can usually solve the problem by going to a 4S store or a professional garage for maintenance and replacing the spark plugs, fuel filters and other components. If the problem has not been solved, it is usually caused by the following three reasons: 1. Abnormal air intake system; 2. Abnormal fuel system; 3. Abnormal ignition system. Generally, the ignition system will not only have problems in the cold state, so it is more likely to have problems in the oil circuit or engine sensor.