I'm not sure if this is the right thread but I might as well give it a try. I have a terrano with TD27 engine. When in idle and aircon is off, the rpm is 750 (I had this adjusted already. before it was 950-1000) but when the compressor kicks in, it rises to 1000. Is there a way to change the idle speed, maybe through an adjustment screw of the idle up, to lower it to around 800-850 when the compressor is on?