Intermittent boost loss

[Heavyhaulmark]

Hello and good morning! Newbie here. I'm having an intermittent boost problem. A little background, the truck is a 2013 factory 4 axle 367 pete with a 600 hp isx 15.
Back in the summer I replaced all the usual sensors for carbon build up.
Recently I have replaced the turbo(complete with new actuator, turbo was purchased from HD Turbo) CAC, boots and clamps. While the turbo was off, I had the complete after treatment system removed disasembled cleaned and reinstalled.
I haul heavy, 220 - 230k loaded, 90k empty so I'm heavy all the time.
After doing the turbo I ran several loads in the 220k weight range when suddenly it developed this boost loss issue. I first noticed it on flat ground. We were fighting a bit of wind so the turbo was spooling about 32ish lbs when POOF down to 10lbs of boost.... no codes, no warnings, all other gauges normal. Boost pressure returns after about 30-60 seconds. It began repeating this randomly. My first thought was the imap sensor. Upon inspection, IT WAS PACKED with carbon. I cleaned it up and the problem seemed to go away albeit temporarily. Now it's back. Looked at the imap again and it's not bad, light carbon only. I'm going to change it again anyway, but is there anything else any of you guys can think of to cause this? Tia!