Why didn't anyone tell me that the guages are to have the valves screwed shut to get an acurate reading? LOL, My 95 Lincoln has a reading of 0 on the low side and 100 on the high side, the manual says it should be Low 22-47 and the high should be 160-245. My other car not a lincoln but still need help is a 95 T-birds pressuer is Low side 25-50 guage jumps back and fournth with compressor coming on, and 75-100 on high side guage jump back and fourth with compressor running. The manual says it should be Low side 25-50 and High side 75-100. Any help is greatly appreciated. I think I might be able to do this myself if I have help. Please, I have a lot of free time now that the economy is so crummy.