I just tuned my 2006 gt with the sct tuner running the 91 octain street tune.I have cmd plates ,twin 62 bbk throttel body ,InJen cold air, ceramic shorty headers pypes x-pipe and ford racing shorty mufflers.When I start the car it revs to 3000 rpm drops to around 1300 then goes into an almost stall mode at about 500 rpm jumps to 1200 rpm then levels off around normal 750.Untile the car warms it continues to rev to high as well as not staying at a normal idle. With the big throttel body it always started at a highr rpm then normal, but this 3000 plus is not good. American muscle tec said it may be a vacume leak.NOT. it would never idle at all if that was the case but I did check all ares for a laek. Then he said I have to make the car learn idle switch on air cond then off. Anybody hear of this problem?