Let me start off by saying I don't know much about a/c's. All I know is I like it cold!! I started having the same problems as many of you all have had with cool air on driver side vents and not so cool air out of passenger side vents. I went down and bought a 12oz. can of freon and put it in. I now have cooler air @ 50 deg on recirculate. I would like it colder, any tips or suggestions?What should my low side pressure be at in order for a colder system? Also have any of you all tried any sort of a/c boosters and what were your thoughts? Thanks