When the AC is on and the compressor is cycling, does the aux fan come on? If not, you may have too low of a freon charge. Don't worry about what the pressures are when the car is off, that's not when your AC works. Either way, should be around 90-100 psi off as pressures are equalizing between low and high side. As mentioned before, Low pressure side should be in between 30-40 psi with the AC compressor on and high side should be near 180-220 or thereabouts.

How much freon did you put in the system?

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Allen Kroliczek
Oak Grove Autosport | Oak Grove Autosport
01 G500, 82 300TD, quite a few more.....