What I didn't expect was that apparently anything wrong with the system may cause it not to function... at all. This includes such things as just a single plug out. I found this out yesterday trying to leave work...

I don't know with certainty it *is* just a plug out, because (shockingly) it wouldn't start without the glows. It could be a failed relay - which would suck. However, it seems to be most commonly the plugs themselves. The ones under the intake crossover pipe.