What Causes High Idle Speed When Starting a Car in Winter?

[DiLeonardo]

Here are the reasons for high idle speed when starting a car in winter: 1. Low temperature in the cylinder and poor gasoline atomization. To meet the necessary combustion conditions, the electronic fuel injection system will require an increase in the concentration of the air-fuel mixture. 2. The engine will raise the idle speed to increase fuel injection, thereby enhancing the concentration of the air-fuel mixture. Additional information: Idle state refers to an operating condition when the engine is running without load. When the accelerator pedal is fully released while the engine is running, the engine is in idle state. When adjusting the idle speed, the RPM should not fluctuate abruptly, as this can cause premature wear to the engine. An engine is a machine that converts other forms of energy into mechanical energy, including internal combustion engines, external combustion engines, jet engines, and electric motors.