What Causes Fluctuating Idle Speed When Running AC While Stationary?

[FelicityLynn]

Fluctuating idle speed when running the AC while stationary is generally normal. However, the frequency of fluctuations should be observed to determine the interval between fluctuations. If the interval is about 1-2 seconds, it indicates a fault in the AC system. Replacing the oil seal when necessary can effectively improve this issue. Below are relevant explanations: 1. Definition of idle speed: The engine's idle speed is called the engine idle speed, which can be adjusted by modifying the throttle opening. 2. Meaning of idle state: Idle is an operating condition of a car, where the engine runs in neutral gear. When the accelerator pedal is released while the engine is running, the engine enters idle state. Idle speed should not fluctuate excessively, as it can cause engine wear. 3. Idle speed range: A well-performing engine typically idles between 550-800 RPM. Issues with idle speed can lead to abnormal engine noises.