So I'm driving and I down **** and acs light comes on, can't change any modes and seems like it almost cuts power out. I pull over pump is making a loud *** noise, turn the car off and back on and I can am change all modes and turn the acs on and off but still seems that I can't get on it. I haven't read if a awc pump would cause that or not. Engine seems to rev but just doesn't go as before