Some addititional information:
I hooked up an analog volt meter to one of the injectors hoping to see if the signal to the injector was dropping out.
I expected to see a pulsating voltage across the two injector leads but instead I saw almost no voltage - even when it was running "properly".
So I measured each lead to ground - both running and not.
In both cases I saw 12 V when running. As/after it dies (cant tell which) it drops to about 11.5 then drifts up to 12.5.
At this stage of the game I don't have a clue what to check or try. Any ideas would be quite appreciated.
Thanks!