3406E warms up looses boost ?

[Heavyhauler]

yes I do have a air intake sensor. when we changed the temp sensor and wiring, we changed the intake pressure sensor for hopes of good luck. with no probable cause that either of those where an issue. no check engine lights or anything. it certainly is a mystery. I'm talking to Milton cat and trying to go to dinner with one of the older techs. bring him up to speed per se and show him the truck. Then send in the truck for him to have a shot at it. he is specifically good with cat and cat programing/live data. when I do figure it out I'll be sure to post. but I'm open to any an all ideas