High idles with a/c - hear a relay clicking on/off in the car as idle bounces

[clydesdale]

I can hear something under the driver's side of the dash click and then the idle jumps about 500-750 rpm. 20 seconds or so later, it clicks and kicks back down, 20 seconds later kicks up. I don't know if it is timed with the compressor kicking on, but the a/c blows ice cold and the idle is TOO high, about 2k rpm. Any ideas?

[jlevie]

Idle speed is supposed to increase when the compressor clutch engages, but not that much. Intake leaks and/or a misbehaving ICV could result in too much speed increase.

[clydesdale]

But, what do you think I am hearing click in the dash as the idle jumps?

[jlevie]

That may be the compressor relay.