Thanks for the replies, guys.
I had to set the pump back to get the idle back down to around 800rpm. You would think it would idle slower, not faster. A bit dismayed, and besides quite busy (getting the winter firewood ready and other things), I decided to give 'er a "Italian Tune-Up". Hardly a scientific approach, I blasted her up to 4000rpm in a couple of gears, holding her there as I was going uphill. The NA really is useless above 3200rpm, or at least my 2 engines are. I rarely rev it past 3 grand anyway. I figured one of 3 things could happen: 1) it would improve, 2) it would blow up, 3) nothing would change. Well, it did seem to improve a bit. Idles the same. It just feels a bit less lazy.
When I start it, it feels like it isn't getting fuel, like the pump is 1/2 empty or the injector lines are drained. Starts and quits after a bit of cranking. Eventually it runs steady. I have 2 tanks, the stock one with the stock fuel pump in it since over 2 years, and a fuel filter. Good flow of fuel out of the filter with the key on. Second tank in the back of the truck in the box, higher than the injector pump, gravity feed. Separate filter for that one also, with fuel comeing out freely. Besides, if either one were plugged it wouldn't rev up, certainly not to 4000rpm blowing smoke. No visible fuel leaks anywhere. I have been running it off the gravity feed tank, so run-back isn't going to happen, especially with the return higher than the feed. Sucking in air...I don't believe, or again it wouldn't rev up, due to the lack of fuel.
I haven't given up on the alternative fuel idea yet, but I do need to figure out what happened. I'm going to see if I can rebuild my other injectors, then try them. I know they are bad, so fixing them up isn't a bad idea anyway. I have a pump on the other motor, so it may end up going in the truck, though honestly I don't know how "correct" it is, as that motor ran with the bad injectors.

Ahhh yes! the joy of it all! <img src="/forums/images/graemlins/cyclops.gif" alt="" />