420A Rough idle when AC on

[Culon1997GS]

hello guys, I've had this problem since I bought the car, whenever I turn on my ac the rpms drop drastically, to the point where you can feel the car vibrating since my rpm gauge doesn't work unless I've been driving the car for like an hour, I cant give you guys an exact number of rpms when ac on or off, but its that bad at the point where even my throttle response is affected when I turn off the ac while driving I can instantly feel the difference in power.

 

[disisbo]

I actually have the same problem, if you come to a solution post it please .