At idle (900rpms) on a 90? day I'm seeing 240 psi on the high side and anywhere from 25 to 35 psi on the low depending on where in the cycle it is. The 2.2-2.5 x air temp rule says the high should be 198-225, but I don't know if that is at idle or at a higher rpm. The high side will drop to 225 if I raise the idle to 1500 but I can't remember if that is where I'm supposed to be within the 2.2-2.5 range or if it's at idle. Also if you let the car sit with everything off and let the system equalize, what should the pressure be? Isn't that how you verify you have the correct amount of freon in it? Thanks for any and all info.