Hey guys i just recently traded a good family friend my deleted and tuned 6.4 for a late 99 f250 with 83k. He was the original owner and the truck only moved if his 29' fountain boat was on the back. The truck is clean its always had the oil changed at 5k with royal purple. The truck has all the basic bolt on's exhaust intake and a hypertech programmer:lame:. The issue is hes been thru the truck new up pipes no boost leaks good fuel and oil pressure and an adustable wastegate. The truck will pull 17psi and then the wastegate opens it will drop to 15 and pick back up to 17. The wastegate will flutter as low as 10psi I know its venting boost but with an aftermarket waste gate the ecu should have no control over it. Its done this with the factory waste gate and that adjustable one. I wanna take the truck to ford and reflash it back to stock and start fresh since the programmer was lost. Im not sure yet on what i wanna do for a chip leaning towards a 6 position with TW tunes. I dont really wanna get to crazy with the truck i had that with my 6.4. What are your guys thoughts and opionions on what could be going on and what to do to the truck. So far i absolutely love the truck iv been around it since i was young and its always held a special place in my life.