rb25 s2 issue

[rsteadrb25]

so i have a 98 s14 with a s2 rb25 with Apexi PowerFC, Tomei Poncams, Tomei exhaust cam gear, Walbro 255 fuel pump, Q45 throttle body. Starts and idles fine when cold. after driving normal for a few minutes and the car gets to normal temp and staying under 3000rpm's, it drives fine but once i go into boost around 4-4500, it cuts throttle and bogs downs and wants to die. when it dies, i go to start it again and it'll start and die again immediately. I found oil in my vct solenoid and replaced it and still giving me the issue.

Not getting any smoke from the exhaust or anything. don't understand what it could be
Need help please!

[rsteadrb25]

bump

[JustinRB25s13'92]

Do PowerFc utilize the stock MAF? other than the fact your running the Apexi it sounds like the standard Mass Airflow Meter is tired, but this is only a guess as to many things make these engines sensitive...I could be totally wrong but my s2 did this until I bought a working MAF...