[Jetdoc]

1. Reconnect all connectors in the harness that are remotely near the ignition system
2. Check for ground wire that were not connected when engine was installed. I know for a fact that the ground that connects to the thermostat housing will disable the ignition if left off. OOPS! There are also grounds on the fuel rail that must be connected.
3. Replace IGNITOR.
4. ECU

 

[Jetdoc]

Try "shaking down" the wiring while trying to start the engine. "Shake down" means grab the engine wiring harness at several different locations and shake or wiggle it. This might just help you find your wiring problem. If this doesn't help, bite the bullet and get an ECU from Ebay and try it.
Recheck all fuses and engine bay grounds.