Okay so I don't really know anything about cars at all and have never attempted to do anything to my car. Lol so I bought an Artic Freeze synthetic A/C charge with the gauge included. I found the port to hook up to, which is ever so conveniently located on the front passenger side of the splash guard around the wheel. I literally took one screw off and bent the plastic down far enough to get to it. So I hooked the gauge up and it kept fluctuating from empty pretty much (white) to the red before I even added anything in. This scared me because I know it can easily be overcharged. So I added just a little and it began moving even more into the red but returning back to the white. Eventually it stopped fluctuating and resting on the edge of the white and green. And it got harder for me to pull the trigger on the charge can the more it went into the green. Idk did I do something wrong? Is it broken if it was fluctuating before I even put anything in? Is it normal? IDK. My A/C isn't really cold either. I mean its colder but not as cold as I would like. I didn't fill it all the way to where the pie shape was either according to the temp outside..