What is the normal idle speed?

1 Answers
Keira
07/29/25 8:56pm
Different manufacturers produce engines with some variations, resulting in no definitive value for engine idle speed. Typically, a normal engine idle speed ranges between 1100-1500 RPM. Idle speed generally refers to the state where the throttle is completely released, and the engine operates naturally. However, the engine's RPM is higher when cold compared to when it's warm. The primary purpose is to allow the engine to warm up quickly and reach its optimal operating temperature. Only under these conditions can the engine achieve good lubrication. If the idle speed is too low, the engine may shake; if it's too high, fuel consumption increases. Design engineers aim to keep the idle speed as low as possible without causing shaking, to save fuel.
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