Does anyone know what this means?

[Dubzino]

My 2001 i30 lately after I warm it up and put it in drive orreverse the rpms are around between 500-600 and after I press the gas a little it and go down the road itgoes back to normal. Why do they drop so low after me warming up the car? I used to have a system in but I took it out. Does that have anything to do with it? Could it be voltage regulator?

[internetautomart]

my engine always idles that low.

[Dubzino]

my engine always idles that low.

Well mine does not. I ave ahad my car since 12k and is now around 45k. So I would have yours checked if its idling that low.

[maxhopper]

My 3.0 automatic idles between 500-600 rpms when in drive(at operating temp).