Is It Normal for the Car to Idle at 1500 RPM When Starting in Summer?

[MacMadelyn]

It is normal for the car to idle around 1500 RPM when starting in summer. During startup, the vehicle experiences a cold fast idle, meaning the engine is cold, and the air-fuel mixture cannot burn stably. The engine is also just beginning to operate, so the idle speed is increased to prevent stalling. Unstable idling can lead to the following hazards: High idle speed: If the car idles too high, check for loose or leaking intake manifolds, as this will significantly increase fuel consumption and accelerate engine carbon buildup. Low idle speed: If the car idles too low, there is a risk of stalling while driving, posing a safety hazard. Fluctuating idle speed: If the idle speed fluctuates, it may indicate that the spark plugs or ignition coils are not functioning properly, causing the engine pistons to misfire and resulting in severe vibrations.