its not my mustang...but my 2000 expedtion(same motor as the mustang).well yesturday when i got work it wouldnt start when i first turned the key.but when i tried again it did start.well today my wife was going to the store and when she tried top start it....it did the same thing...it would start and cut off.i tried it and it wouldn't stay cranked for me.i put my foot on the gas annd kept it craked while i put it in gear to pull it forward.after i stopped the truck it stayed cranked...but the idle was alittle high.i shut it off and it cranked right back up................and idea's on this?thanks ohh ya...the truck has 73,000 miles on it.