CM870 Boost problem?

[B model]

Its unplugged, and I have owned it since new. This is a new problem started happening about 2 1/2 weeks ago. It was just odd idle at first, I ran the overhead. It runs way better a couple of days and then idles funny again, clean and check fuel and meter actuators, really idles and runs good for a couple days then starts idling funny again and wont boost, I get insite, btw thanks for your help Rawze, start checking all codes except for unplugged code are like 10000 hours old. Also made sure actuator moved by hand and through Insite. It has developed a pattern of when it does it now. It will run great and idle smooth like glass and then I get to where I'm going and generally waiting to unload and after about 15 mins of idling I notice the idle gone to SH_T and I touch the throttle and no boost. It has done this three times, the first boost came back as I was moving truck so next truck could unload, ran great all the way home. The second it didnt come back right away and dropped out a few times coming back a 2 lane road and was out on the road to the house. My Inline6 was delivered that day and I went and got a computer that night and tested next morning, but it was running great super smooth idle and all boost. And yesterday same sh_t ran great and then unloading started idleing bad and I had a bitch of a time getting home as it would come and go and would sometimes not be like full boost but just enough to cruise. And about 10 miles from home snapped out of it and ran great, immediately hooked up laptop and no codes and actuator test works fine. Also it will not boost on first start till it passes 105 psi of air on first start in am, and I cannot remember if it has always done that or not??