Hey man don't smash your head anymore.
What you got there is fine SR16VE engine with a full N1 intake manifold and probably some internals.
You ain't have a genuine N1 engine. A SR16VE will always be a 1,6lt engine and the SR20VE will give you hard time...
You can use a diagnostics software to read the code of your ecu and find out what you actually have. Since you don't have 8 injectors you don't need a N1 ecu, you can tune yours.
All Genuine N1 use a hydraulic transmission, 8 injectors, unique Aluminum 80mm maf 22680-2N500, special air hose and air box, unique AAC valve 23781-1N500, etc...
Their fuel rail comes with a single regulator and no fuel damper...