[brucepick]

Found the inj. power wire.
It's in the connector in photo but not the fat yellow + black wire noted earlier.

It's yellow + black, the top position, center column (as shown in photo with connector clipped to bracket).

daring4, yes, I'm pretty sure the injectors are individually controlled both for timing and maybe also duration, attempting to adjust qty per cylinder to keep it smooth??

Now - from dcb's post, I'm reminded that cutting the 12V power to injectors will NOT be directly noticed as fuel cut by the 'Guino because it reads the ground side of the inj circuit. So after fuel cut the engine spins down for a second or so before stopping. So the Guino would read fuel use till the engine stops spinning at which time the computer stops firing the injectors via the ground-side circuit. That's when the Guino will recognize full fuel cut. Over a tankful I calculated that might be .04 gal which may or may not be "significant".

To get the Guino to read it properly, I'd need to either follow the notes to kill the input from those 2 sensors to the pcm - OR - cut the 12V injector power and at the same time, cut the injector signal to the Guino. That would require a 2nd relay running off the dash switch that will control fuel cut. I could handle that.

It's late. Work tomorrow. G'night.