What Should the Normal Idle Speed Be?

1 Answers
LeAlyssa
07/30/25 8:59am
Idle speed normal values vary depending on the vehicle model and engine type, generally ranging between 500 to 850 RPM. During cold starts, 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. Relevant details are as follows: 1. If the idle speed is too high, check for loose or leaking intake manifolds. High idle speeds can increase fuel consumption and lead to engine carbon buildup. 2. If the idle speed is too low, there is a safety risk of stalling while driving. Fluctuating idle speeds may indicate faulty spark plugs or ignition coils, causing engine piston misfires and severe vibrations.
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