Back fires, popping and loss of power

[5timesturbo]

So, I'm running stock engine management except for a TCD chip, BEGI rrfpr and of course bigger injectors (30# if it matters). I've got a MSD 6a as well. I most recently got my boost situated …..I'm trying to keep it around 13 to 14 lbs at the moment. SOMETIMES when I get to around 14lbs and I'm high in revs the car pops, I think it backfires....I know for sure it kinda boggs down and loses power. I try to see what the air fuel meter is saying when it does that but its so much going on in the car....I'm not sure if I caught a glimpse at the right time. I believe its saying somewhere in the 10.5 range. I think my rrfp is raising to fuel pressure too high which is making my mixture exceedingly rich....but I ask you turbo m30 pros....what you think it is....or how I can go about remedying this issue. I want to be able to smoothly go through the rpm no matter how hard I'm driving the car…… Is this a rich/lean situation or does it sound like something else???