What Causes Shaking During Rapid Acceleration?

[DeAlivia]

Vehicle acceleration shaking can be attributed to the following reasons: 1. The most common cause of car shaking is a dirty throttle body or excessive carbon buildup in the fuel injectors. When there is too much carbon deposit inside the engine, the gasoline sprayed by the cold-start injector will be largely absorbed by the carbon deposits, resulting in an overly lean air-fuel mixture during cold starts and making it difficult to start. In this situation, the car will only start easily once the carbon deposits have absorbed enough gasoline to reach saturation. 2. After starting, the gasoline adsorbed on the carbon deposits will be sucked into the combustion chamber by the engine's vacuum, enriching the air-fuel mixture. This leads to fluctuations between lean and rich air-fuel mixtures, causing idle shaking after a cold start. 3. The lower the temperature, the more fuel is required for a cold start, and the presence of carbon deposits will significantly affect the success of the cold start. Cleaning the fuel system can help resolve this issue.