butchtakamine Posted February 13, 2017 Report Share Posted February 13, 2017 bought a 2013 f150 3.5 engine with 40,000 miles. i often hear a knock at idle or a little above idle. i hear it in the floor board, hump/ pedal area. dealer says it's the turbo winding up, i'm having a problem believing this. Any ideas ?? Quote Link to comment Share on other sites More sharing options...
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