What Causes High Idle Speed?

[StBrady]

Causes of high idle speed: 1. The engine's throttle is dirty or malfunctioning. 2. The engine's spark plugs are faulty. 3. Excessive carbon buildup in the engine combustion chamber, intake tract, fuel injectors, or intake manifold, leading to incomplete combustion of the mixture. Below is an introduction to idle speed: 1. Idle state refers to a working condition when the engine is running without load. When the engine is running and the accelerator pedal is fully released, the engine is in an idle state. The reason idle speed increases fuel consumption is that the engine is not operating under normal conditions. 2. At idle, the engine speed is very low, the intake turbulence weakens, and poor fuel atomization leads to incomplete combustion. Additionally, the prolonged fuel combustion time and increased heat dissipation loss from the cylinders also contribute to higher engine fuel consumption.