[Ross Nicol]

When you first turn the ignition on the fuel pump runs for a couple of seconds and then stops, because as Paul says the crank is not spinning and the ref signal disappears.So can you hear the fuel pump during this time? When the fuel pump stops, open the throttle wide and you should hear all the injectors pulse.I hope you've got the injectors wired in firing order. Test the sensors using the lap top especially the TPS (Throttle position sensor).Is fuel pressure ok? Is the cranking RPM sensible? if not Ref and Sync may be switched.You haven't mentioned whether you are using the laptop for checks but I assume you are.You definately need it.
Ross