OK, thanks guys.
Here's what I did so far:
The GP light works properly and I tested the GP relay and it functions normally. It energizes when it's supposed to and 12v appears on all output tabs. (of course now, the dang check engine light is on and the display is flashing an engine electronics alert. Anyone know how to clear these?
Also, all GP circuits test fine though, sometimes I'm getting a reading of .5 Ohm and other times I'm reading .8 though it's consistant across all six.
Could this be a bad engine ground?
Today, I'll go after the injectors and try the "crack" test. If I find the culprit, I'll go in search of a 27mm socket and switch it to another cylinder and see if the problem follows it.
I'll keep you posted.