What Causes Engine Shaking When Starting a Car in Cold Weather?

[CamilleDella]

Engine shaking during cold starts occurs because the engine's water temperature is too low. To quickly raise the engine to its ideal operating temperature, the fuel supply system automatically enriches the air-fuel mixture, causing the engine to run more intensely and resulting in unstable operation and significant idle shaking. Below is more information about cold weather starts: 1. Preheating is the first and most crucial step when driving in cold weather. Due to low winter temperatures, lubricating oil becomes much thicker and less fluid compared to other seasons. 2. After starting the engine, let it idle at around 1000 RPM to warm up before driving. Avoid pressing the accelerator sharply or allowing the engine speed to become too high. There's no need to wait for the engine temperature to reach the optimal level before driving—starting is safe as soon as the temperature gauge needle begins to rise.