AC troubleshoot

Let me reiterate, you can't just drop 134 into a 12 system without a flush and a new compressor and dryer.
Rv2 compressors cannot be flushed so they must be replaced.
Dryers retain the oil that does not work with 134.

As far as those pressure. Charts they are garbage. If you have 50 psi on low side in a 134 system you do not have cold air period. You can Guage on the high side ambient times 2.5 as a good target low should always be just above freezing


OP needs to go to a professional so he doesn't ruin his system.