Went on this call at a church, back for leak check today, but pressures where I left them. Turned the unit on and it was 76 inside and turned down to 72. Pressures were 200/75. Coil split was 18, and sweating all the way through on all u bends. Super heat was 2 to 3 and subcool was 1 to 2, with bubbles in sight glass, but very minimal, almost milky looking. T-stat satisfied in a half an hour. Went over evap coil with leak detector and nothing. Went to outdoor unit and found a leak on top of suction service valve with cap off( not shrader portion) tightened cap up and not leaking. Found a leak on true suction service port. Seemed like someone had over tightened the shrader b/c could not get core tool on shrader, so leak locked cap. My boss says to keep throwing refer to it but that goes against the grain. Indoor piston(#83) low super heat(measured at service valve), but has low subcool, and bubbles in sight glass. Added a total of 7lbs counting both visits. I knoiw it has to be overcharged, but delta t good and RH 50% db 70 wb 60. Outdoor unit Trane M# 2TWA0048A3000AB S# 3471N213F, indoor unit is 4 ton dont have numbers though. I wonder if the comp valves are bad? Should have tried to pump down. At a loss with this one, any help would be appreciated.