92 Explorer has weird idle!!! What is it??

[raptor125]

I just fixed my brake problem. Thanks to everyone that responded. Anyway, I noticed today that when I started my 92 up and drove it around for awhile and then parked it. While it was idleing, I noticed that the rpm gauge would slighty move every 10 secounds or so. It seems to be surgeing. When it surges, I here a click like something is trying to come on and that is when the surge happens. It idels just fine, but I don't know why it would be doing that!!! I also have a 91 model that is pretty much the same thing, but 2 door instead of 4, and it don't do that during idle. What could it be?? The air conditing maybe? My 91's air don't work, but my 92's does. Any thoughts?

 

[FROADER]

A/C compressor. Mine started to do that. The clutches might be going bad. If you open the hood and watch the A/C compressor you'll know exactly what it is. Might just need some service done to it. I just unplugged it since I never used it.