sir weisshorn yup pag naka aircon ok ang idling nya pag off ang aircon hindi na stable.i observed it first i test it when the engine is cold or short distance driving 20mins. ok naman idling on ang off the aircon then i test it on long driving 1hr to 2hrs on and off ang aircon.pag off ng aircon that's the time na hindi stable ang rpm at parang namamalya.try ko din eh check yung idle up actuator.tnx sa mga inputs....