hi all. i have a mehran vx 2010 wid after market A/C. the problem is that when i turn on the AC i can feel the accelator pedal automatically going down to a great extent and engine races up too much. i went to the AC guy who adjusted the race from under the air cleaner block . it went fine . but the problem rose again the very next day. plz help me to diagnose and rectify the problem . thnx.