Volkswagen Bora's parking jitter in N gear, how to solve Bora's parking jitter in D gear?

The following is an introduction about "How to solve the parking jitter of Volkswagen Bora in N gear and Bora in D gear":

The idling jitter of Volkswagen Bora may be caused by the following reasons: The most common reason for car jitter is that the throttle valve is too dirty or the fuel injector has too much carbon. When there is too much carbon deposit in the engine, the gasoline sprayed by the fuel injection head will be absorbed by the 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, only when the gasoline adsorbed by carbon deposits is saturated, it is easy to run into the car. After running into the car, the gasoline adsorbed on carbon deposits will be sucked into the cylinder by the vacuum suction of the engine for combustion, which will thicken the mixture and dilute the combustible mixture of the engine, resulting in idling jitter after cold start.

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