to test the the I.M.R.C. run the engine , take the vacumm hose off one I.M.R.C. and put your finger on the end of the hose, this should cause the other butterfly to move. and then replace the hose and do the same to the other butterfly.
sometimes the white plastic bushing holding the acuator in the I.M.R.C. breaks and it slips out of the hole.
I also had the 500-800 rpm, clutch cycling every few seconds (and the clogged egr ports in the upper intake) in my 98 and I had one of those bushings fall out, but I also had vacumme leaks and the problem did not go away until I fixed all of my vacumm leaks.
you may want to read my thread to see what I went through
http://www.automotiveforums.com/vbul...d.php?t=903467
as far as your AC take off the electrical connector going into the evaporator and put a wire to the 2 ends of the connector with the engine running your clutch should engage and you should get cold air, if not then you may be low on freon or have a problem in the CCRM
I also had a 95 before and one of the relays was not working and had to solder a jumper wire for it to work, you could try getting a CCRM from a wrecker, in my 95 it was located in the front by the rad and it was very rusty and I am thinking some moister got inside it
hope this helps
fred