Why is the idle speed around 600 to 700 RPM?

Why does the idle speed of my diesel Korando fluctuate?

Why is my S40 idling at 1000 RPM, and how can I bring it down?

Why does the official website say it has a 700 km range, but when I fully charge it, it only shows a little over 500 km? It doesn't even reach 600 km.

Hey everyone, is it normal for the car's RPM to stay around 1200 even when I release the accelerator while driving? The idle speed is only 800 RPM when parked in neutral. Is it the same for you guys?

When I start the car, the idle speed is around 2000 RPM, but after a while, it drops to 1500 RPM. It takes quite a long time to go down to around 1000 RPM. Does anyone know what's going on?

Why is the idle speed around 600 to 700 RPM?

I need some advice from experts: I have a 2013 1.4T Touran. Recently, the engine occasionally makes a loud noise after starting, and the idle speed is over 1100. But after turning off and restarting, the engine sounds normal, and the idle speed is around 700, back to normal. What could be the issue?

The Volvo C30 2.0D has a normal idle speed of 850±20 RPM when in gear, but the idle speed is high at 950±20 RPM when in neutral. What's going on?

It's normal for the idle speed to fluctuate when you turn on the air conditioning in a 2013 1.6 manual fashion model. Sometimes the RPM might go up to around 900 or almost 1000, and other times it might be around 800. If you restart the engine and the RPM goes back to around 800, it's usually not a cause for concern.

After refueling my Jetta VS7 at the gas station, the idle speed tends to be high, around 1000 RPM. Then, during driving, the speed fluctuates. After driving for about ten kilometers, the idle speed returns to normal. Alternatively, if I turn off the engine and restart it, the idle speed also normalizes. I've tested this each time I refuel, and it's always the same situation.