What is the reason for the engine jitter of Hyundai Langlang?

Idle jitter of modern langlang engine;

1. The engine has serious carbon deposition.

The most common cause of automobile jitter is that the throttle valve is too dirty or the fuel injector has too much carbon deposit. When there is too much carbon deposit in the engine, the gasoline sprayed by the fuel injection head will be absorbed by a large amount of carbon deposit during cold start, which leads to too thin mixture during cold start and difficult start. In this case, it is easy to start the car only when the absorbed carbon-deposited gasoline reaches saturation. After the car starts, 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 thinner and thicker, leading to cold start.

In addition, the lower the temperature, the more oil is needed for cold start and the more carbon is deposited, which will affect the success of cold start. The solution is to clean the oil circuit, check whether there is carbon deposit in the idle motor, and clean it.

2. Ignition system problem

Check the working conditions of spark plugs, high-voltage lines and ignition coils. Poor ignition system and poor ignition of spark plugs can also lead to such failures. The solution is to check whether there is too much carbon in the spark plug and replace the spark plug.

3. The oil pressure is unstable

If the engine carbon deposit has been cleaned, the throttle valve has been cleaned, and the oil pad and spark plug have been replaced. And the body is still shaking when idling. I suggest you go to the 4S shop to check whether the oil supply pressure and intake pressure sensors are normal. If the oil supply pressure of the oil pump is abnormal, or the intake pressure sensor has an incorrect value and works abnormally, the body will shake. The solution is to check the oil pressure and replace the parts if necessary.

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