94ChasteFD3S

Not sure if this may belong more in the Haltech specific, or racing section, but I figure I'll try to source some ideas here first.

I've been researching the best way to wire in my two additional fuel injectors, without buying a(nother) new harness.

My setup is:
Haltech Elite 2500 with the Plug N' Play Adapter
Rywire Mil-spec Engine Harness
(4) ID2600xds secondaries
(2) ID1300xds primaries
Xcsessive LIM

I have the injector outputs available, so I would rather not just tie the secondaries in pairs especially since they are so large. I will be running a flex fuel setup so when it's turned down on pump gas I won't have trouble pulling fuel out of it. I have seen this mentioned before, and it seems like a reasonable approach with an ECU lacking injector drivers and/or smaller injectors.

I have my car torn apart currently and the wiring harnesses are out of the car, so I'd also like to take the time to do it properly. I've laid the harnesses out and used a multimeter to determine the pin locations on the ECU connector after the PnP connector adapter for the #5 and #6 injectors. No biggie there, crimp on pins and insert into the connector. The question I have is, where are you guys tapping the 12v+ from? Since I have a PnP harness (instead of a customized flying lead harness with it's own fuse/relay block for instance) it becomes slightly less straight-forward. Theoretically I could run the injector signal wires from the ECU plugs to their respective injectors, then only pair the 12v wires. Like this for example:


The blue dotted lines are the dedicated injector outputs from the ECU, so they will still have dedicated controls, just tapped for power locally from the harness near the injector plugs so it's still controlled by the EGI relay and the engine harness is still it's own separate harness from the chassis harness. If I recall correctly, I had continuity between pin 4B at the ECU and the injector 12v wires, but that seems like a messier place to pull from with everything so clustered at those connectors and not that much length to work with.

I'd like to hear some more opinions from you guys before I pull the trigger on an approach.

Thanks!