You shouldn’t be messing with AC system since it’s obvious you don’t know what you’re doing or talking about.
Static A/C pressure in a car should be measured when the system is not operating, but it is important to note that the pressure will equalize between high and low sides shortly after the system is turned off. Typical low side pressure can be around 70 psi before the engine is turned on for a recharge.
I agree with Tester on this, and most any A/C tech will agree also…
For example, your vehicle on a hot day say ambient temperature of 90° with humidity about 75% the engine off static pressure on a 100% working vehicle like yours will be around 110 psi (on both high AND low side psi), when running around1800+rpm with a large fan blowing across the condenser your head (high side) pressure should be ambient temperature times two plus 50 psi, so on a hot day as described above that means the head (high side) pressure should be around 230 psi and low side around 35 psi… The orifice tube or x-valve should allow the pressures (with engine off or A/C turned off) to equalize no matter what it is… With the engine off or at least the A/C compressor turned off, the high and low side WILL be the same…
In your case after checking for leaks, the proper way is to evacuate all the freon out of the system and maybe pull a vacuum and see if it will even hold a vacuum, then add the correct measured amount of freon back in so you know you have the proper amount of freon and then re-check the Head and Low side pressures and go from there, I would also add dye when charging the system to help find the leak…
If the ambient temperature is greater than 45 F, those pressures indicate your system has less than 1 ounce of refrigerant. Add refrigerant, perhaps you can get one more season from this vehicle.