Can anyone advise me? i have a 05 st 150,done 14000 miles the car runs fine ect, but when coming to standstill the rpm is slow to settle at 750 rpm where it should be,it likes to firstly to go to about 1250 rpm then go down to 750 then after 30 seconds blip up to 1250 then finally settling at 750, which is very embarrassing when trying to park or maneuver.I have taken to car to local ford dealer and they say there is no fault code when plugged into diagnostic check.
Is this normal for a ford,as i have had many other makes of car but never had this problem.My thought is could this be the idle control valve, bearing in mind when in motion the car behaves fine???