I’m installing a stand alone 4 plug Simtek ECU into a 1997 WRX. All going well but I’m a bit unsure on the injector setup.

For other ECUs (DTA, Omex etc), I normally supply a 12v supply to one side of all the injectors and they are switched individually via the ECU.

It appears that the Impreza is supplied individually 12v from the ECU on terminals 11, 12, 13 and 26 and the injector grounds come back to the ECU on terminals 24 and 25 on plug b44 … could someone in the know confirm this for me please?

Thanks in advance for any help.

 

Stand down guys. I’ve found a more detailed diagram showing the injectors 12v fed from a relay. Terminals 24 and 25 described as Inj GND just go to earth by the looks of it.

cheers