Well with a bit of help from the internet and fellow travellers I seem to have at long last sorted out the wiring and problems I have been having. It's been a slow laborious process and I have had to deal with incredible frustration at times. The experts in the field have been very kind in making wiring information available and without them I would have had to pay someone to do this. After having wired the original sc400 loom with some practical modifications, and still not getting an injector pulse, and making my plight known on this forum and elsewhere I tried a few more things today. Just in case the coil igniters had anything to do with it, I swapped them for the ones off my 89 Celsior. That made no difference. I also checked with a multimeter to see if the cam and crank signals were reaching the ECU. They were. It would start easily and idle very roughly just on the cold start injector, but strangely, shutting the ignition switch off didn't stop the motor. I had to disconnect the battery to stop it.. A bit of poking around with a test light showed that the three relays I had installed to power the Igniters, injectors, and pin 24 MREL on the E9 plug would not shut off with the ignition switch. Normally on pin 24 this is 12 in from the man efi relay. I don't have an efi relay so I powered it from a 40 amp relay switched by the ignition switch. Once activated, all three relays refused to shut off with the ignition switch. When I removed the relay that was powering pin 24, the remaining two performed normally and shut off with ignition off. On reading the instructions once more, it seems that the author had had the same problem. So I did what he did and wired pin 24 directly to the output of the ignition switch. We then tested for injector pulse with a noid light and it lit up like a Christmas tree. We then started the engine and all 8 injectors were firing. I disconnected the cold start injector and it still fired up. Finally.
However as the old saying goes, "One door closes, and another one shuts. (Ha ha!)" I had originally bought the engine in a half cut about 9 years ago from an old guy in Newcastle NSW and he had bought it about 10 years previously and had used a few things from it. It had been left uncovered with the bonnet off in the weather and it was pretty grotty. But I figured it was only cosmetic and took a punt that the engine would still be okay internally. It should have been. I have never had the engine started until now. When I first fired it I immediately noticed a loud tapping noise coming from the inside of the motor. I have heard this kind of noise many times in my life and it wasn't good. Sounded crank/piston related. But I wasn't too concerned because the plan has always been before the trike is actually put on the road to do a full rebuild of the engine. While we were fooling around getting the engine running and starting it up several times all of a sudden the tapping magically completely disappeared. That put a smile on my face because the thought went through my head that whatever was causing the noise had rectified itself. So I took the revs up a little and the smile on my face disappeared as quickly as it had appeared. The floor of the shed was sprayed with metal shrapnel and oil as a conrod/piston assembly let go and found its way to the outside world via the sump and the side of the block. Bugger!!!!! Well at least it lasted long enough to enable me to sort the wiring. I have a spare engine and am looking forward to rebuilding it.