Suction line froated back to evap coil pressure 60 over 275 has a txv

Sounds like bad valves in the compressor.
A good indicator is how fast the pressure changes when you shut the compressor off. It should take several seconds for the suction pressure to rise. If it's immediate, then expect a bad valve.

is there pressure in the high side? equalize the high/low sides pressure thru the use of gages and start the compressor and take note. The condensor valves should be opened to the evaporator, both high and lowsides

HFC-134a ? Critical pressure is 588.9 a . With a 93 LL temp and 575 head, I would suspect 1. Air in system or 2. Ref. has gone critical.
With a 110 psig suction/85 deg.F and a LL temp of 93 deg.F/125 psig

You have to let the system run for a while for the suction pressure to stabilize, if the metering device is a TXV pressure will rise and fall as the valve opens and closes. If this is R22 you need to get the suction pressure up

http://www.arkema-inc.com/pdf/fluorochem/Forane404a_pres_temp.pdf

What is the
"Superheat" on the suction line 6" from compressor ?
Did you change the drier and evacuate to at least 500 microns ?
What model number is the condensing unit ?
Does the system have a "Crankcase Pressure Regulator"
if so is the TXV ZP type ?

Hello take a evap coil split (return temp vs supply temp) 18*F would be great.If it is lousy the TXV valve is restricting the flow of freon or the filter drier is clogging.Adding freon will overcharge the system and the suction will NOT improve.

I assume the fan is running in the outdoor unit. Do you have guages connected to the unit? What is the suction pressure when in trips? There could be a restriction in the refrigerant line. Suction pressure would be low if this is the case. Check the temperature on both sides of any filter/driers. A difference in temperature from one end to the other would indicate it's restricted. The same would go for any component in a refrigerant line. Did someone add refrigerant recently? If the unit has a TXV it could be overcharged. It's also possible for a TXV to go bad. Hope this helps. This problem is hard to solve without seeing the unit.

see if it's adjustable if not it has to be changed

check the true psi with the line psi to see if same if psi is good in cooling 225 hi and 70 low on 80'day then compressor is fine and i would start checking for temp difference on the reversing valve sometimes this will cause high suction or high discharge psi shift it manually with by energising it be cooling or heating then pull wire and see how it shifts if shifts good then txv on out door unit could be bad what is the psi in heating on the discharge line going to the indoor unit? most prv's are set at about 350 psi r22 as for suction line size its only hot gas in hp mode os no problem their shows in cooling mode as low suction psi ..hope this helps some also make sure indoor coil is clean!....thanks & rate me

disconnect the blower and turn on the ac.see if the coil frosts evenly.when you had the system open,you should have changed the liquid line drier.