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
ROBERTSUNRUS wrote:
:) Hi, I have a four valve 5.4 L engine in my Navigator; I have about 123,000 miles and still running the original spark plugs with no problems at all with drivability.
Awesome! Just hope you never have to change the plugs, sometimes it goes well... sometimes it doesn't and a broken plug has to be extracted.
