i bought a 2004 F150 Fx4 and im just concern about the clicking noise coming from the engine when its on idle, and for the people who hear it, has the same question if my truck has a diesel engine, while its not, by the way this is my first truck and i dont have a knowledge about truck. Please guys help me any ideas?

 

Do a search on "Cam Phaser", starting to gather alot of info here about it.