Interesting comment from an online board
"Any Ford Truck with a 5.4L Engine The 5.4L 3-valve engines used in Ford Trucks from 2004 to 2010 develop camshaft phaser issues, especially when engines exceed the 100,000 mile mark. The first sig...
Forum Discussion
The 1999-2003 Port Improved head 5.4L has the same issues as the 3V 5.4L. The 97/98 while lowered powered did not.
