OAP Pete
As an EX Auto sparks [now retired] , just a few things to try, are you sure the wiring is right way round on Pump, Bosch Pumps are marked on terminal end. Remember brown is "neg". You should not need to bleed system as it will do it itself as Pressure to regulator...then returns to tank. So i dont think Air locked. The cold start injector is on the intake manifold...just to the left ...looking from front, you can slacken the fuel union at the end of cold start injector...switch ign on off....Pump should run for a few seconds... full pressure should come out of this union as its on the main pressure line....be care full hear...get someone to hold a Rag over spraying petrol.