What is the reason for the shaking when starting a cold Magotan?

[StJasmine]

The reason for the shaking when starting a cold Magotan is excessive carbon deposits inside the engine. The gasoline sprayed by the cold start injector is largely absorbed by the carbon deposits, resulting in an overly lean air-fuel mixture during cold starts, making it difficult to start the engine. Only when the carbon deposits become saturated with gasoline does the engine start more easily. After starting, the gasoline adsorbed on the carbon deposits is then sucked into the combustion chamber by the engine's vacuum, enriching the air-fuel mixture. This causes the combustible mixture to fluctuate between lean and rich, leading to idle shaking after a cold start. A simple method to deal with injector carbon deposits is to drive the car at high speeds on the highway or to drive at low gear but high speeds for a period of time, increasing the engine RPM. The purpose of this is to enhance the engine's air intake and gasoline flow, which helps in clearing the carbon deposits from the injectors.