This problem has occurred 12-15 times. after the engine is turned on and put into drive, it starts to buck/hesitate like it is not getting gas. sometimes this is violent and other times soft. it is not bad gas. sometimes it will go for 6-7 weeks without doing it and other times it will happen two days in a row. dealer will not attempt to fix it because after keeping it over night they could not duplicate the problem and would not take my word for it. if they order a part and it does not fix the problem ford will not re-imburse dealer so i am suppose to risk my life pulling out into traffic with a truck that might not make it. truck has 4500 miles . bought new at end of october 2012. there is no read out on the computer when this happens. love the truck but not this safety issue. *tr