Hello .....do you know if you have the R12 or the R134 system ?
Does the AC compressor come ON ?
Usually ,with 80 F outside temp.the correct readings should be : the gage on low side should read 40 to 45 psi and the High side should be 200 t0 225 psi
Let me know.
I have a chart that shows correct readings I need to know how to diagnose if a system is over or under charged. In the numbers you used if the system was low on freon would the readings be 30 low side and 180 high side and what would example readings be if overcharged
An overcharged system will show both sides numbers higher then the specs.
You need to charge it if both numbers are lower than specs.
If the low side is high and the high side is low you may have compressor failure.
I if the low side is low and the high side is higher than normal,you may have blockage on the system.