What is the normal idle speed?
1 Answers
Due to differences in vehicle models and engines, the normal idle speed varies. Generally, the idle speed ranges between 500 and 850 RPM. During a cold start, the idle speed may momentarily reach around 1500 to 2000 RPM, but it will stabilize within the specified range once the engine coolant temperature reaches 90°C. If the idle speed is too high, check for loose or leaking intake manifolds, as excessive idle speed increases fuel consumption and engine carbon buildup. If the idle speed is too low, there is a risk of stalling while driving. Fluctuating idle speed may indicate issues with spark plugs or ignition coils, leading to engine misfires and severe vibrations.