Diesel Bombers - boost fluctuates at mid to high throttle

Hi guys just wanna start off by saying there is a lot of good info on this forum. I've been very impressed. I did a search and couldn't find anything on my particular problem I am having with my 08 f350 king ranch dually. At mid to high throttle the boost Guage fluctuates between 15 and as high as almost 30 psi. I'm also getting a louder engine noise from the intake it sounds like. I can also hear it blow off like air rushing when the boost drops. Any ideas? The truck is 100% stock right now. I have already order a dpf and egr delete and a tuner for it but wanted to take care of this problem first. I think I mistakingly put this in the wrong section if a mod wants to move it it was supposed to go in 6.4 powerstroke page. Lol