My AC went out on my 2011 Rogue. I replaced the compressor. I did add 3oz of oil to the compressor when I changed it. I sucked down the vacuum and leaked checked it. I added one can of R134 and the compressor was working and cooling the car off. the label on the car said there should be 1.1 pounds of R134 so I started adding a second can since they are 12oz cans. the compressor started squealing after running 5 minutes. The pressure on the gauge never got up to 40 psi. It was around 20psi. I tried the AC again today and the same thing happened after running 5 minutes it started squealing. I replaced the belt and tensioner with no help. Does anybody have any ideas?

to NICO!

Are you seeing low and high side pressures, or are you charging with one of the adaptors that shows low-side only pressures. What led you to declare the old compressors dead?

That sounds like maybe the new compressor is defective and locking up after it gets warm.