Hey guys, it's starting to warm up so I cranked up the ac in my truck. After running for a little over 15 minutes at highway speed, it's not getting cold. In fact it feels hotter. So I figured I'd get a can of 134 recharge it. I picked up one with the gauge and followed all the directions. The system was empty. So i started filling it and it quickly rose to about 50 while the compressor is off and like 15 when its on. The compressor comes on for 3 seconds and goes off for 3 seconds and it constantly cycles like that. The gauge says that anything over 60 is in the " danger zone". Is that on the low end or the high end? Because the ac is somewhat cooler but nowhere near cold.