The reason why the car engine is not strong enough to catch fire in winter.

1. When the battery is at low temperature, the power generation decreases, resulting in low starter speed. 2. Insufficient evaporation of fuel or aging of ignition system, or excessive consumption of spark plug, which makes ignition difficult. 3. Poor low-temperature performance of lubricating oil and improper use of label lead to high viscosity of lubricating oil and excessive internal resistance of engine at low temperature. 4. There is something wrong with the vehicle air/temperature metering equipment, which leads to inaccurate data, and ECM can't know the actual situation and control the air-fuel ratio accurately.