What is the cause of engine jitter in cold weather?

What is the cause of engine jitter in cold weather that everyone cares about? Let me explain something to you:

There are many reasons: 1. Is the imbalance of the mixture inside the engine. One cylinder of the engine is not broken. 3. The problem of vehicle air flow meter. 4. Due to the low-temperature start, the gap between the internal parts of the vehicle is too large, and the lubricating oil is not lubricated in time. 5. Carbon deposits appear on the throttle and air intake. 6. The water temperature sensor is out of order. Engine jitter may occur at low temperature because of poor combustion in the cylinder. You can check the valve and air intake of the engine. Maybe there's carbon in it. Because of too much carbon deposit, the vehicle will shake during cold start. At this time, it is necessary to clean up the carbon deposit. Million car purchase subsidy