Hey guys the other day I got a couple cans of freon given to me so I added one to my grand prix. I'm not sure if it needed it or not the a/c always worked good I just wanted to try to make it a little colder. So I hooked the Guage up to the car and it took a few seconds to get it hooked on there and I could hear the freon escaping from the lines while trying to hook it up, but I'm sure not that much really came out. But anyways, ever since I added the can of freon the a/c hasn't been working right it will be cold for a second then hot off and on. Today I opened the hood and noticed the compressor kicks on and runs for maybe 1 second and then turns off for 3 or 4 seconds, it just keeps cycling on and off like that. What could I have done to the system? Did I add too much? Sorry I wanted to ask before I did too much research incase I don't find out anything because I don't have very long to fix it before my wife needs to take it. Well anyways, thanks for any input that anyone has to offer!?