Reasons for Shaking When Starting in First Gear with a Cold Engine

[LaKendra]

Causes of car shaking: 1. Excessive carbon deposits If there is severe carbon buildup in the engine cylinders, it can lead to spark plug blockage and valve blockage, directly causing the car to shake during idling. If the car's acceleration performance has significantly declined and the shaking is persistent, consider cleaning the engine cylinders. 2. Fuel supply system failure Unstable fuel pressure can easily cause fluctuations in the mixture concentration, not only resulting in shaking but also causing unstable idling. First, consider replacing the fuel filter, as prolonged use may clog the filter element. Then check the fuel pressure bypassing the fuel filter; if abnormal, it might be an issue with the fuel pump. 3. Aging engine mounts This is also a very common cause of shaking. If the engine shaking becomes increasingly severe but the power does not weaken accordingly, consider whether it is an issue with the engine mounts.