[brcidd]

If you are dead flat- which it sounds as if you are, then you need to find your massive leak- so just adding some refrigerant, a little at a time will be needed, in order to find your leak- a good sniffer, or dye check is needed, or it may even hiss at you-- did you ever decide if your OEM condenser was ever replaced? They are notorious for leaking at passenger side lower mounting bracket- it tears away from the tank- cracks from vibration- and you can see the leak by just popping the hood and looking at the oily residue.