Just finished my TII swap, engine will start and I can hold it if I am continuously pumping the gas pedal at lower RPMs, but it will not hold an idle and will just die.

Here's what I have:
stock TII JDM motor, emmissions removed, and TB mod
All new intake gaskets, hoses, fuel filter, pump, spark plugs and cleaned injectors
RB downpipe to Apex NI duals, Apex intake, Greddy Profec B II

Have triple checked all vaccum lines, adjusted TPS, and played around with the idle adjuster under the IC
tried 2 different 374 ECUs and the old 350, no difference.

Any ideas before I get it checked out?

 

Check the AFM.

Edit: the car will start.. But run like complete crap and be very hard to keep going if the AFM is not plugged in and hooked up right. I'd start there.