Causes and solutions of idling jitter of Ruifeng m4 engine;
1. Spark plug problem
If the spark plug of automobile ignition system fails, it will cause problems such as poor working of ignition system and poor ignition conditions of spark plug. This will lead to dynamic and other unstable faults when the car is idling.
Solution: Check the working conditions of spark plugs, high-voltage lines and ignition coils to see if there is too much carbon deposition in the spark plugs. Once found, clean or replace the spark plug immediately.
2. Quality problems of fuel oil
According to the survey, most domestic car owners have unstable faults such as "idle speed" jitter, which has a great relationship with fuel quality. Inferior fuel will damage the performance of the engine, thus causing idling jitter.
Solution: Cleaning the "accelerator" of the car in time can basically eliminate common faults. If it can't be solved, it must be repaired. In addition, when refueling, be sure to add high-quality fuel regularly.
3. Excessive carbon deposition or aging of the engine.
There is too much carbon deposit in the engine, and the gasoline sprayed by the injector will be absorbed by a large amount of carbon deposit during the cold start, which leads to the lean mixture during the cold start and makes it difficult to start. In this case, it is easy to drive only when the gasoline absorbed by carbon deposits is saturated. After driving, the gasoline adsorbed on the carbon deposit will be sucked into the cylinder by the vacuum suction of the engine for combustion, which will make the mixture thicker, and the combustible mixture of the engine will become thinner and thicker, resulting in idling jitter after cold start.
Solution: Clean the oil circuit, check whether the idle motor has carbon deposit and clean it.
4. Aging of engine base
The engine foot is actually the damping system of the engine. The engine feet are responsible for absorbing slight vibration when the engine is running. If there is something wrong with the engine base, these vibrations will be transmitted to the steering wheel and cab, causing idle vibration.
5. The oil pressure is unstable
If the oil supply pressure of the oil pump is abnormal or the value of the intake pressure sensor is wrong, it will cause the body to shake.
The solution is to check the oil pressure and replace the parts if necessary.