Hey,
I gotta 04 F250 Sd 6.0 Turbo Diesel and under part throttle and wide open acceleration it seems to surge a little like the egr valve is opening and closing in waves. That may not be what is happining but it is all I can think of. Maybe its a waste gate opening and closing, but it kinda seems like it is hunting for a proper position for ideal combustion or clean air. It runs normal at steady speeds. There probably is not a broken or worn out part causing this, it could be half normal.

Any Thoughts?

O yea, I just put a high pressure oil pump on it with 2 other sensor/regulators whatever they are. One on the valve cover and one on the side of the pump in the valley.

 

so its got a new hpop and icp and ipr. The turbo isnt wastegated but you might be having probs the variable vanes in the turbo sticking.

 

Sounds like sticky turbo vanes to me.

 

Turbo needs to be clean mine did the same thing cleaned it and it's all good now!

 

You know I had my fingers all over that turbo when I put the HPOP on it, I was turning the turbo, feeling if it is smooth and not sticking and I didn't see any part of any variable vanes. Do these vanes change pitch somehow? I hate to seem ignorant, but I guess I am. I did notice that they seemed to be double finned. Now that it is installed and I am not looking at it, How could you clean it? Carb cleaner or brake cleaner? I did WD 40 it a lot to get the dirt off the intake side.

 

you have to seperate the exhaust housing from the turbo and clean the vanes and unison ring inside the housing

 

DTS Articles - Turbocharger Reconditioning

 

mine did same thing pull the turbo break it in half clean it reinstall and your surging is gone