[pc8481]

Ok this is kind of a strange question. I just bought a 98 Honda Civic HX last week and have encountered a strange problem. With the A/C on the car idles normally at about 900 rpms in neutral, but when I turn the A/C off and let it idle the rpms jump between 2000 and 900. It almost sounds like it's going to stall. I thought it might be the clutch on the A/C compressor, but that would only make sense if it idled erractically with the A/C on, but it only does it while it's off.

Any suggestions? because I'm stumped.

Thanks so much.