I have 2 problems with the AC in my 91 legend LS 4 door. First problem when I turn the AC on sometimes it works and sometimes it doesn't. I checked the belt and it is tight. When it is working I can feel the compressor kick in when I turn it on. If it is working it cools just fine. I was thinking maybe some kind of sensor is telling the AC that the car is cool enough so it shuts off. Second problem is with the AC running the car seems as though it is sputtering hesitating or skipping. If i go to the exhaust iI can hear the car making the skipping type noise. It actually does the same thing very minor when the AC is not on sometimes. It has 182K on it and just had the 180K service done to it. Any suggestions or advice would be greatly appreciated.