I have a LS/VTEC swap with a GSR head, running on a stock JDM b16 ecu into a 96 civic cx hatch.

The car doesn't hold a idle (need to keep revs up or it dies)

This is what was done to try to fix it:

Replaced Ecu with 2 others (including p28)
Replace Dizzy/Plug Wires/spark plugs
Replaced injectors,fuel filter,fuel rail,filter
Replaced the whole engine harness

I tried 5 different IDLE CONTROL VALVES
New TB/ IM GASKET
NO vac leaks!
Cat isnt clugged
Compression is 180 - 180 - 150 - 145
Timing is fine


Only thing I can think of it the TB gasket isnt OEM, I am so puzzled with this car, I need any ideas on what to try next.