My Buick HRV06 is an old car in 2006, and its idle speed has been very high.

1. The idle speed of a car is the lowest speed set to ensure that the car can run smoothly without stalling. As long as these two conditions can be met, the idle speed will be lower.

The better. As long as the engine can run smoothly, without shaking and flameout, it is possible The lower the idle speed, the more fuel-efficient it is, because the idle car

It must be parked there, otherwise it doesn't need to consume fuel. If the idle speed is high, there is only one disadvantage, and that is fuel consumption.

. The idle speed of most cars is between 600-850 rpm, with 700-800 rpm being the most.

2. Too much carbon deposit on the throttle; Leakage of intake manifold or various valves.