so at first my ac didnt work yall suggested checking the pressure and sure engh it didnt have any so i bought the 134a retrofit kit kit and changed it over and it worked great the first day now it keeps kickn the clutch on and off while driving and sometimes even idling i was wondering if yall any other ideas the pressure is rite at 45 and when the clutch is engaged it does make weird sound almost like a grinding noise but not exactly like a grind im not sure how to describe it but anyways its really annoying going down the road feeling it when it kicks on and off...i know at full throttle it should cut off but it does constantly even when i am cruising down the road at normal speed...i have a vacuum gauge installed and when the ac is off it runs between 8 and 15 hg at highway speeds just depends on if im passing people or not and when the ac is on its between 5 and 12 hg...to me that is normal so im not sure wats going on and why it keeps kickin the ac clutch off any help would be apprciated

 

probably undercharged. also if you didn't have any freon in the first place you have a leak.

 

cant be undercharged at least according to the gauge its at max pressure for the system and if it had a leak then the pressure would drop and its been 45 since i put it in 2 weeks ago