MAXXFORCE DT 2012 No Power No Boost Slow Throttle

I have a 2012 Maxxforce DT twin turbo model that has a super slow throttle response. If you test drive it takes forever to come up to speed but once the turbos get going the power seems to come back. when the truck shifts it loses the turbine momentum and just falls back on its face. We have checked the turbos for coking and cleaned them. We checked and put a new small hose for the turbo solenoid that sits on the small turbo and found the original line to be cracked. thinking that would fix the issue we test drove it and it did not change at all. that truck starts great in cold weather and idles very good but just has no power at all and the boost pressure never gets above 13psi back pressure is what throws me off because it never climbs above 20psi the fuel pressure is rite around 75-80psi and I know spec is 90 but I checked other trucks that have come through the shop, and all read lower the that and run great. DPF has been swapped with a clean unit and same thing. the EBPV has been checked and is free and clear the throttle body is flat and not creating a restriction. I am really lost with this truck. the throttle response is so slow even with it in neutral it takes forever for it to come up past 1800 rpm. any help or suggestions would greatly be appreciated

 

Then I would assume its a 10. valve cover says maxxforce DT Yes I've done a boost pressure test we are a diesel repair shop that primary works on Cummins cat Paccar Hino Isuzu stuff so this is throwing us for a loop as we don't typically work on these engines much. It says 230HP. we have NEDS and a snap on scanner that we use ICP desired and actual match pretty good +-150psi no fault codes
VIN - 1HTMMAAL5DH202198

 

Yes, the fuel filter has been changed. I am honestly at a lost with this truck cause i hate throwing parts at truck I've always put pride in not doing that but this is seriously throwing me for a loop! now it's doing something it wasn't when it was brought into the shop. when you start it for the first 10 min of it running you can't accelerate or anything it just doesn't do anything other than idle. after about 10 min it will slowly allow the throttle to come up and rite around 1900-2000 rpm it gets this bounce in the RPM really weird

 

No check engine light. Ill check those connections and get back to you. I know exactly which ones you're talking about! I guess I'll make an appointment with Mccandless and see if I can get it flashed to the latest software. Have any more ideas as to where to continue as far as the low power no boost conditions?

 

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so I have actually removed the cold side CAC thinking that it could have been plugged, checked it, and no difference whatsoever that is actually when the no revving started happening I have not actually checked the heater. Grid for excessive carbon buildup, but will do first thing Monday morning before taking it to the dealer for a reflash any other suggestions?