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Message: <blockquote data-quote="nichelson1" data-source="post: 13789" data-attributes="member: 2246">I just removed the plastic engine cover on my 2012 3.0 V6  to pinpoint the dull tapping thud.I narrowed it down to a flimsy plastic component behind the front of engine factory plastic catch can.This part has what looks like a 5/16 or so plastic vacume hose going to it.I can change the severity of the tap by wiggling this item.It is between the firewall & intake.I thought the high pressure fuel pump was a hard metal item securely bolted to the engine.This is a wigglable plastic part that is tapping at idle.Any experts out there?</blockquote>