oem

I have a 97 Civic DX coupe:
Installed all of this and engine isn't starting up, are these part's compatible with each other:
-I used a modified DX engine wire harness, eg...wired in KS, VTM, VTEC soleniod, IAC valve, TP sensor, secondary 02 sensor, CKF sensor, and some others. i also changed the plugs to match the wires up from 2-3, vice versa... i basically followed Helms wiring diagram step by step.
-Engine B16A2 and all parts from 2000 Si, axles, linkages, tranny, distributor, starter, mounts.
-using a 1998 P73 ECU ITR instead of of 2000 Si ecu because it made my swap a lot easier in terms of wiring into my 97 DX
-do you see any problems why my engine isn't starting up?
-i checked all the ground wires... eg... tranny and engine, oil fluids have been topped up,
-I checked the wiring schematics about many times and they seem to be ok. eg, TP, MAP sensors,
-the engine is turning over, but just not starting up.
-could it be possible of a faulty P73 ECU that i have? how can i check?
Any help will be greatly appreciated.