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Im getting a very loud rattle out of my motor, fuel pump, pulleys, valves, timing I cant figure out where exactly it is coming from but it sounds like something is fixing to jump out of the motor! Its way louder then a 5.9 at idle... and at 1,000rpm plus goes away and nice and quiet, under 1,000 starts back up again at WOT runs fine no change in performance :banghead: the truck has 160,000 miles all deletes and no codes. Im running a Edge on PL3 with stock timing. It has been cold lately so I have been plugging it in at night and still does it weather it is cold or not... Do I need some kind of additive for the fuel or ???? Im to the point I don't want to do any damage to whatever is making the noise so I don't even want to drive it! I can also take a video if it would help...? I need some kind of starting point... Any help would be greatly appreciated! Thanks Guys:thumbsup: