What causes the BMW 530 to shake and stall during cold starts?

[AdrianaLee]

When the BMW 530 experiences shaking and stalling during cold starts, it is primarily due to carbon deposits causing incomplete combustion of gasoline. This leads to engine shaking, unstable idling, difficulty starting, high temperatures, and a tendency to stall. Below is an explanation of cold starts: 1. A cold start refers to starting the car when the engine coolant temperature is low. 2. If the car can start smoothly several times in a row when the engine temperature is normal, it indicates that the battery is in good condition and that the shaking during cold starts is simply due to insufficient oil temperature, with no issues in other car components. 3. Generally, engine shaking may also be accompanied by piston knocking, which can result in severe wear between the piston and cylinder walls.