Thanks jCat, got er done last night. I replaced the orifice tube while the system was open. It took a while to get enough in but it finally started blowing cold again. Probably not the best idea but I used the big can (22OZ) with the gage on the hose plus one more smaller can (18OZ) from Oreily's. They only sell r134 with sealer added that come with any sort of gage for reading the system. I know the "real Mechanics" out there are saying, "you cheap skate". Well, for as often as I do this, it ain't worth me buying a full gage set-up and areal bottle of r134. The sticker on top of the cannister mounted by the firewall said the system holds 2lbs 12oz and the guy at Oreily's said it probably won't hold all 22ounces since I wasn't sucking the system down with the "proper equipment" Anyway, the compressoer finally stopped cycling and low side pressure finished up at about 27 psi (IDLE ) on the cheesie gage on the hose. I checked pressures at 2k rpm as well while it was cycling and got form 23 to 65. 27 was just inside the "filled" band of the gage. I'm sure I could get more in to bring it to the middle or high side of that "filled range but without a pressure gage on the high pressure side, I think I'll see if I can live with it.