Since the last thread was getting cluttered and I'm experiencing this problem again, I decided to make another thread. I'm getting closer to tracking down the problem.
What was/is happening is that while driving the car will randomly shut off completely. Usually it will start right up if I shut the car off and restart. Twice now though, I've had it just completely quit and not restart. It will start for a second then die.
I hooked up my fuel pressure gauge to make sure FP was good, it was. What I noticed though, is that when the car stalled (after a second or two of idling) the FP gauge would drop back down to the levels it was at as if I just primed the car (52psi or so), not the levels it was at while running.
So I ran a wire from the positive on the coil, to the interior of the car where I used a constant 12v feed to power the coil when the car started to stall. The car would start on its own, but when it started to stall I fed 12v to the coil and the car resumed idling/running (would rev fine too). I unhooked the wire and the car died. Next try though I left the wire off to make sure the results were reproducable. This time though (and the subsequent 2-3 times) the car started and stayed running on its own.
I have swapped power modules with another one I had, and before the car was being fed 12v to the coil, the car behaved the same way.
Does the logic module have anything to do with what I am guessing is the ASD circuit?
When giving the + coil wire 12v, which systems are being fed power and why would it run on its own after having to feed that system power once?