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Re: 2004 f150 tapping sound.
I'm not sure if you have figured out what your problem is with your engine, but I have an 04 F150 5.4 3v engine also, and mine ticks like a small diesel engine. The tick is actually the Camshaft Phazer. These are a variable cam timing engine, and when the phazers don't work properly they will tick or knock. In my town it is $800.00 per head to have them changed.
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