When i start my car the revs of the engine are normal but after a while of riding(about half a tank) the ideling revs go up like crazy when the car is standing still. i have tried setting the thr trim down, the idle screw, low rev value and the high rev value nothing works. the weired part is that when i accelerate the engine again then the revs go back to normal but as soon as i stop the buggy for more then 5 sec then the revs start going up to a point were the thing just over heats and dies.

Please help !!!!!!!!!