What is the normal idle speed for a cold start of a car?

[VonKate]

For a cold start, the normal idle speed of a car ranges from 800 to 1750 RPM. However, different models may have varying idle speeds due to differences in their engines. Generally, after a cold start, there is a period of high idle speed, which is more noticeable in winter. This phenomenon is controlled by the vehicle's onboard computer. Once the engine reaches a certain temperature, the idle speed will return to normal. This process helps accelerate the engine's warming up to its optimal operating temperature during a cold start. Idle speed refers to the operating condition of the engine when the car is in neutral gear. The engine speed during idle is called the idle speed, which can be adjusted by modifying the throttle opening size, among other methods. Essentially, idle speed means the engine is running but not performing any work.