What is the normal idle speed for a vehicle?

1 Answers
StPiper
07/28/25 3:04pm
For an engine with good working performance, the idle speed is generally between 550-800 RPM. Idle speed refers to the operation of the engine under no load, where it only needs to overcome the internal friction resistance of its components without delivering power externally. The minimum speed required to maintain stable engine operation is called idle speed, which is one of the five basic operating conditions of an engine. Generally, different vehicle models may have slight variations in idle speed, and the specific value should be determined based on the vehicle model. Below are some relevant details: 1. There are two types of engines on the market: turbocharged and naturally aspirated. Due to the differences in engines, the idle speed values also vary. Even for the same engine model, different tuning can result in different idle speeds. However, under normal circumstances, for a properly functioning vehicle without any engine abnormalities, the idle speed is generally below 1000 RPM, typically maintained between 600-900 RPM. 2. Under different environmental conditions, the vehicle may exhibit a higher idle speed when first started. For example, during cold weather or a cold start, the engine requires reaching a certain temperature to achieve optimal operating conditions.
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