So far as for the car not starting up, I remember the time whe it all began when I started up the car, it cranked normally, and instead of starting, it just made a sort of clunk noise, I doubt it could be engine knock as I can not identify any damage on the engine block.
The only things I have done in terms of electricals so far, was some cable management for the ecu and securing it into place, and looking inside the fuseboxes to see what fuses are being used so that I could see how to rewire the harness