IACV/EACV Cleansing Pt. 1

Ok, So one day My 91 Honda CRX Si started idling very strangely. Shot up to about 2500rpm’s, for a bout a two seconds, then down to 500rpm’s for about two seconds. Then back up to 2500rpm’s. I allowed it to do this about six times, then I turned off the engine. So I turn to , asking for advice. One said I should clean my eacv/iacv. So I looked up how often this happens, and it seems to happen more than it should. So seeing how I have never done this, I felt I would be the perfect gui