hello gentlemen, this past friday I was on a no ac call, head psi was 350 and rising, suction was 75. This is a 2 ton, with a slant coil, at an apartment complex. Capillary tube. The unit will not pump down. Begins but bypasses. Ok. I recovered the refrigerant. Blew dry nit. through. First making sure the liquid dryer wasn't in the loop. I put a lot of pressure through to the evap. coil but barely any coming back no matter which direction I blow into. I am saying restricted coil or cap tube. ?????????