a/c problems 93 maxima

[tmedley12]

After we pull a vaccum and install freon at 1.4lbs it will blow past the front seal on compressor what can it be? have replaced compressor two times ,drier ,expansion valve and evaporator once. THANKS

[nissanracer300zx]

Your car sounds bad news, I have a question how do you charge a a/c system with the recovery machine, but you are setting it to charge what valves are you suppose to open from the recovery machine and what valves are you suppose to open from the cylinder the gas valve or liquid valve, Im confused if you tell I will tell you the problem from your car.