That's exactly right Mike. I will likely use a relay on the injectors as it can failsafe in the closed position. The other relay will be replaced by an electronic latch which will better interface with the existing circuit and some other signals such as a switch sensing if the trasmission is in first or second gear, neutral, and an input sensing if you are trying to start the engine. Naturally the whole thing could be done with relays, discrete semiconductors, or ICs. Since I wanted the new circuit to fit in the same size and location as my max regen circuit I went solid state.
No point in a full description until I'm sure it works in the car. I wouldn't have even mentioned I had it working on the bench, except that Dfiore seemed to want to design something like this, and there is little sense in duplicated effort unless it is for a hobby or school project.
The fuel injector wires dissappear into the wiring harness and this seems to travel through the firewall and down to the area of the passenger floor mounted computer. Where did you tie into the wires with the relay? I seem to recall it was in the IMA battery compartment. Sorry, I could probably find this in the FAS discussion but when I transferred it to Word Perfect it was 50 pages long!