Originally Posted by lasoyatang
I have a 2005 f150 5.4l and it also blew a plug and an injector. ford replaced them both for free , the guy told me ford extended their factory warranty to 150,000 miles on injectors and plugs because it's happenening so much.
Ford did extend the warranty coverage on the injectors for the 5.4L in the 2005 F150 but I've heard nothing about any extended warranty on spark plugs. The warranty on the injectors was extended to 11 years/120,000 miles.