Turbo sounds like creating back pressure
You know how when you start the wonderful 7.3 in the morning, and you get the turbo to blow off "phhhhhhfffffff" like air comming out of a rigs tank, blow off valve. well every once and a while when i start it up and drive the turbo wants to, i beleive create back pressure and blow off, it happens around 1500 rpm and there is lack of power durning this. to remidy this i get the rpms higher to bout 2000 then it blows offf and turbo sounds fine. or is this a valve that is not opening and closing when it should???? have any of yall had this problem????