Automotive Manual PDF

Ford 4.6L and 5.4L 3-valve engine cam phasers, how they work, their limitations, and how COMP uses them for making more power
What are cam phasers?
Ford’s cam phasers are specially designed, computer controlled cam gears that have the ability to adjust camshaft position while the engine is running. They are used on all 2005 and newer, 3-valve Ford modular engines. Since the modular engine uses two camshafts, one for each side of the engine, two cam phasers are used per engine.
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