Auto Air Conditioning & Heater Repair: Ac problem 1998 chevy silverado, chevy silverado, side firewall

Question
compressor quit coming on so i checked pressure and added some freon. Now the small line over on the passenger side firewall gets cold at idle then very cold at driving rpm range but the other lines wont get cold and the air will get cool while driving but not like it used to. could this be the orifice is stopped up?  

Answer
YOU MAY HAVE A POSSIBLE BLOCKAGE/ CHECK IF ACCUMULATOR CAN IS SWEATING. IF NOT, BLOCKAGE OR COMPRESSOR LOST IT`S PUMPING STRENGTH..YOU NEED TO TAKE SERVICE GAUGE READINGS TO DETERMINE THAT.-20-30PSI ON LOW SIDE///180-210PSI ON HIGH SIDE...

GOOD LUCK ,DAVIDT