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The 2004-2008 F-150 truck was introduced in January 2003 for the 2004 model year as the redesigned eleventh generation of the F-150 lineup.

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engine knocks when hot when going slowly

engine knocks bad when hot only when trying to go slow like a drive through. put in neutral and give a small rev and it stops.

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First things first, get it scanned and see what codes come up.

Knocking implies bearings, usually big ends and it doesn't usually go away with a rev.

But what you call knocking I may call pinging. So are you saying it sounds like an old diesel with that death rattle they have in the top end. Or are you saying it has a dull thudding noise coming from the bottom end?

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Robert Carter-Wood さん、ありがとうございました!
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