SR20DET idle problems, struggles and dies

[Apexi]

I have a sr20det mostly stock with a fmic, full 3" turboback, aftermarket turbo manifold , walbro, safc, sohc mafs. It had always started great and idled great but one day I started it up and it had idle problems. I would start the engine and it would idle for one second and then shake violently and die.
Ive done searches and have changed the maf, sprayed carb cleaner into the iacv, vaccumm is fine at 20, changed the spark plugs, changed the fuel filter, cleaned the injectors and it will still have the same problem and the sr20 falls on its face. Ive also tried disconnecting the coolant sensor, mafs, o2 sensor, safc. but still have the same problem. I have even tested the throttle position voltage. I am stumped and any help would be appreciated.