What is the appropriate idle speed for a small car?

[Declan]

Small cars typically have a normal idle speed of 700 to 800 RPM. Below is an introduction to related content: 1. Low RPM: Low RPM can cause engine shaking, and the idle speed is relatively high during cold starts. 2. Reason: This is because working at low temperatures can cause wear on the engine. Below is extended information on the hazards of car idling: 1. Carbon buildup: If the car's idle speed is too high, check whether the intake manifold is loose or leaking, as this can significantly increase fuel consumption and lead to more carbon buildup in the engine. 2. Car idle speed too low: While driving, there is a safety risk of stalling at any time. 3. Unstable idle speed: If the car's idle speed fluctuates, it may be due to spark plugs or ignition coils not working properly, causing engine pistons to malfunction and resulting in severe shaking.