Cummins ism cm875 weird running

[Celticsevad]

Ism 2005 egr deleted
Valve lash and injector replaced 2 weeks ago
First start in the morning after the valve job i had no boost until air tank are full, then i shut the engine off and start it is ok

1 week later, sudden loss of boost , egt skyrocking and cant get the boost back , or only after 15 start stop of the engine

Then i quit and come home to look at it
Found Cummins / Holset air control valve connector with bad connections,

My question is : does that failed air control valve can make the engine crank weird (like no compression sometimes) and when it start , white smoke all around the turbo exhaust side, and will want to die on first fuel pedal press.

I usually see intake pressure 0.78 at key on, then 1.44 on start, now i have 0 on both.
Replaced intake pressure sensor ,and barometric sensor, at idle it have suction in the hole of intake sensor(normal or not?) Can it be caused by the Cummins / Holset air control valve not working?

Should i look somewhere else like fuel lines under the truck... all help would be a lot appreciated
3 mechanics had a look at it and cant help me at all