[SOLVED] WOT fuel pressure loss during shifts

Hey all, I was hoping someone here could help me out with an issue I'm having and maybe someone else has experienced the same.
I have a 1st gen speed 3 with a built motor, Port injection with a AEM 340 fuel pump and ID1050s, ST manifold, CPE exhaust manifold, BNR S6, CS 4" intake, CS 3.5 turbo back, TR1045 IC, 3 port ebcs, and currently on my 5th revision on 30psi on pump 93.
During my 3rd to 4th gear shift I'm losing fuel pressure while doing a pull. It's weird because my AFR doesn't go lean but the car sputters and drops down to around 1200psi for a few seconds then jumps back up for the rest of the pull. I'll post a log for you guys to check out but I'm lost at this point because the only time it's dropping pressure like that is right after a shift into the gear while racing. Not sure if maybe the Split second controller map needs adjusting or the tune itself or if I have something else going on. Datalog 7 is the 3rd-4th gear log and datalog 8 is a WOT log in 4th

 

Have you done a prv test? That's where I'd star that and check the ground near the hpfp is snug.
Curious question, who's tuning you? Probably unrelated, which map sensor and ebcs are you using? (Collecting data on the last 2)

 

Yeah I did that test and it climbs slowly but I believe it does climb all the way to 1850. I only watched it till about 1200 before I got out of the car but I'll try watching it longer later. HPFP ground is good. Is there really 2 types of valves? I heard him say there's one that relieves pressure at 1850 and one at 2075
I'm running a 3.5 bar Corksport map and just a Mac 3 port boost controller

 

have you done any modifications to the in tank fuel pump or pump basket?

 

Yes I replaced the stock fuel pump with an AEM 340. Maybe the way I did the o rings is wrong. Is it supposed to be the oem white sleeve + the 2 orings supplied?

 

I did mine like JT did and it works.

 

Yeah turns out it was my HPFP. I threw in a brand new OEM pump today with new CS internals and issue is gone. Not sure what part of the old HPFP failed but something went.