Late rb25det s2 (s3?) swap no start :(

[Jclarkb43]

Late rb25det s2 (s3?) swap no start :(

So i have an 1990 r32 gtst at the end of a very late rb25det s2 swap, the 25 came with a neo style CAS. I kept my rb20 gear box, and ecu (nistune type 2 board with rb25)for some reason my check engine light does not come on at all, and i can not put the ecu in dignostic mode. I am using my 20 loom, using my 20 coils, ignitor and harness, on the cas i have swap the wiring to match the neo style pin out and i have strong spark on 1, 2, and 3 but starts to die after that almost to almost nothing. Im getting fuel and pump primes when get is turn to "ON" injector pulse i can hear and feel it when i turn the cas by hand. It cranks but does not run. Still using the rb25 s2 TPS. I am out of ideas at this point.

Any help would be greatly appreciated.