Bought an A/C recharge kit for my Focus. Didn't work. Tested the relay as good, and the diode as good (I think). Anyway, the compressor kicked on as I was adding the 134A. Seems like it immediately leaked out. Is locating the leak something I should attempt myself? Nearly every car I've ever had has come with A/C, but it's always been broken. So not fixing it isn't a huge deal, but I like to fix things myself if I can.