fitting a new motor, need some help with wiring for the injectors.
Somebody has linked the injectors together, found a broken wire in the loom, that i can rejoin.
after further investigating i have found that three wires come from the ECU W/BL, BL/SIL and Y/BL the BL/SIL and Y/BL are joined together into one wire BL/SIL, further down the loom i have two Y/BL wires joined to BL/SIL feeding Injector 4 & 2 and the BL wire feeds 3 &1 injector ?????
 The W/BL wire is linked to all four injectors as well.  this does not make any sense at all. can anybody help???

The injectors should all be getting power from the same wire, and then they will be grounded through the ECU in pairs.
 
So in your case it looks like:
W/BL is the power wire
BL grounds Group 1
Y/BL grounds Group 2
 
I don't know why Y/BL has other wires attached to it though. Seems odd

Thanks for your help