Hello everyone. I have a 1994 Escort LX 1.9 with auto and factory A/C. My A/C was getting cold, then would go hot. I took it to a shop and had it placed on the machine and it holds vacuim and has not leaks in the system. However when the coupler is removed from the high side you can hear a leak right at the high side valve connection. So as far as I know my A/C system is fine other than that leak right at the high side port. Can I replace that righ side port and simply charge it with 1.2lbs of r134a? Also with the system going from cold to hot and back to cold, should I replace the orifice tube...as I hear they can become clogged over time? My Haynes manual does not cover A/C troubleshooting. The books tells me that A/C work is beyond the book thus does not cover it.