What is the reason for severe shaking when starting the Sail?
1 Answers
The most common cause of severe shaking when starting the Sail is a dirty throttle body or excessive carbon buildup in the fuel injectors. Below are the relevant explanations: 1. Excessive carbon buildup: When there is too much carbon buildup 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. In this situation, the engine will only start easily once the carbon deposits have absorbed enough gasoline to become saturated. After starting, the gasoline adsorbed on the carbon deposits is then drawn into the cylinders by the engine's vacuum suction to burn, making the air-fuel mixture too rich. The engine's combustible air-fuel mixture alternates between being too lean and too rich, causing idle shaking after a cold start. The lower the temperature, the more fuel is required for a cold start, and the presence of carbon deposits will significantly affect whether the cold start proceeds smoothly. 2. Air-fuel mixture: A too-lean air-fuel mixture during a cold start makes it difficult to start until the carbon deposits absorb enough gasoline to become saturated. After starting, the gasoline adsorbed on the carbon deposits is drawn into the cylinders by the engine's vacuum suction to burn, making the air-fuel mixture too rich. The engine's combustible air-fuel mixture alternates between being too lean and too rich, causing idle shaking after a cold start.
