What is the idle speed of an automatic transmission car?

[LeonardoLynn]

Under normal conditions, the idle speed of an automatic transmission car is 700-800 RPM. Below are the specific details about car idle speed: 1. High idle speed: The hazards of high idle speed include increased fuel consumption, elevated engine operating temperature, and accelerated machine wear. 2. Low idle speed: The hazards of low idle speed include stalling during startup, which can damage the engine and starter if frequently restarted. Additionally, excessively low idle speed may lead to stalling while driving, and long-term operation can cause carbon buildup in the engine cylinders, resulting in weak acceleration. 3. Prerequisites for idle speed adjustment: The engine temperature must be normal, valve clearance appropriate, ignition system functioning properly, all pipelines well-sealed, choke fully open, and throttle able to close tightly.