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Heightened exhaust noise that calms when changing throttle position on 2012 5.4L
I have a 2012 5.4L that looks and runs like new however during cruising at speeds above say 35mph will sporadically display an increased exhaust noise from up front, almost as if unburnt fuel is being introduced into the exhaust system and being ignited by the cat converter(s?). Changing...- scag386
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- Forum: 3rd Gen Ford Expedition Engine & Performance
