Hello I've got a 2003 f350 6.0 185000 miles and its having some problems it seems to be bogging down losing power when over 1500 rpms an it will blow black smoke it feels like over fueling issue but recently replaced fuel pump and injector 2 also it has an egr bypass kit any help would be helpful or if any questions about it let me no!!

 

Sounds like a boost leak.

 

Agreed!

 

That's were I would start

 

Do a ficm test google instructions

 

If your turbo is the VGT type (which im sure it is), it could be that the vanes are stuck or sticking and not allowing your turbo to build boost. A good turbo cleaning should fix your problem. BTW, that means removing the turbo, taking it apart and cleaning off all the soot and carbon off the moveable vanes (in the exhaust side of the turbo). Just tossing it out there.......