I own a 1989 rx7 turbo2 w the following mods:

Rtek 1.8 chipped ECU
BNR Stage 2 turbo
740cc x4 Denso Fuel Injectors
Aeromotive Fuel Pressure Regulator
Walbro 255 fuel pump
Rising RPM fuel rails and emission block off plates
Clutch Masters Stage 4 clutch
Full stainless 3" downpipe and single exhaust Front Mount Intercooler
Godspeed Radiator
A/C removed
OMP removed

Here's a vid:
When it's pulsating I'm holding the gas down like 1/4 throttle. I have to pedal it to keep it running. It won't even idle but every couple starts. When I first started it this am everything seemed fine revved fine up to 7k (after warmed up of course). I go to take it down the street and i gotta pedal it to keep it running. I just put gas in it and a little isopropyl alcohol cause I thought it might be water in my gas. I didn't get fuel filter yet. I was replaced within last 6 months tho. It's all most like the airflow sensor is messed up, that or something with the fuel system. I did a compression test and everything was fine w that and injectors all have new seals. Idfk I can't figure this ish out so any help would be great. Thanks.
Nick