had been having some weird noise(intermittent knock and another noise that i can't describe all while at idle). took it to the dealership and they said my car needs new cam phasers, which i figured. i asked if this is common for this year car and he said for the 5.4 liter trucks it is, but not on the 07 mustang(he stated this is the first they have seen, just my luck). i also asked do they make an improved model of cam phasers so i dont have this problem again and my answer was. anyone else had this problem and has the problem reoccured? there gonna do the install next week on wed. but i have thurs and friday off also if they need the car longer. car only has 9,500 miles on it and its only 1year and 2 months old and very babied on the street. i miss the old 5.0 liter engine.