Working on a continental reach in cooler today. R-134A got there today found suction pressure at 16 no high side tap. Unit wouldnt pull below 45. So decided to recover charge and put high side tap in pull vaccum recharge to factory. New reading 24 suction 150 head. Unit pulled down to 38. But what has me bafffled is I had like 44 degrees superheat. I have a sneaking suspicion it is restricted at cap tube.