Been working to get the stock a/c system going again on my SunCoupe. Purchased car with non-working a/c. Did a complete flush of all components except the compressor. Replaced every oring with new. Pressure tested with nitrogen to 110psi with snoop and found several leaks. Replace the liquid line from the expansion valve to the dryer(major leak). Someone had tried to overtighten this fitting and tore the flanged area off the hose and the oring had no where to sit against. Pulled a vacuum to 28" and it only slightly lost pressure overnight. Was told the a-6 compressor seal is probably leaking and to charge system(134a) and get oil circulating and see what happens. Did that yesterday evening and started the system. Had to jump the compressor to get it to work. Looks line the thermal fuse may be bad. With system running it is only cooling to around 60* with a/c on max. Looking at the inspection window on the dryer and it looks like foam in the window. How much Freon do these systems take? What kind of pressures should I be seeing?