Cameron,
A mate recently dropped a set of Sard 800cc twinsprays in to his setup.
He runs the rb20det pfc on his rb30det and using the technically correct values the thing just would not run.
I played with the values (what they are; I can't remember) until it ran and got the o2 sensor swinging.
The only thing I could think of is the twinsprays some how throw everything out, we didn't check fuel pressure all though once on the dyno all appeared to be good. Perfect cold/warm starts, no drivability issues, excellent fuel economy and expected duty cycle for the power being made.
To this day it still won't run with the technically correct injector size and lag trim.
He also runs a Z32 afm.
I've seen the rb20t pfc do funky things previously when running a non-std afm.
Your problem isn't related but for others in the future.