I have a 2002 Dodge Ram. The last couple of months, when I use the AC it's been blowing out cool air, sometimes hot, then sometimes cold. I was buying a new gas cap today at a NAPA store and asked the sales dude if he knew anything about AC and explaned what my problem was: I told him the same thing as above but added that I've owned the truck since new and never had to recharge the AC. He said that any vehicles that use R134A need to be recharged every year! So I bought the recharge kit equipped with a gague. I followed the instructions on the can and the reading was 150 psi when the clutch wasn't engauged and would drop to about 85 psi when it was. All of these readings were in the red and the clutch would only stay engauged for ten seconds at a time. I was afraid to add the R134A to my truck because... I don't really know anything about the AC unit. I was a mechanic many years ago and do almost everything on my cars and motorcycle just because I love it. But, this time I need to pick someone's brain out there! If you have any idea what I need to do next because of the high pressure I woul appreciate it!