[gtc]

Thanks for the replies so far, here is what I'm working with right now:
1. Engine cranks but does not fire.
2. I smell a little fuel in the exhaust. Confirmed that fuel pump runs by jumpering the DME relay connections (pins 30 & 87b)
3. No spark at a spark plug. Checked voltage at coil (11.2V - low, but possibly because battery is low from cranking) and two coil resistance measurements (within spec). I will charge battery and recheck coil voltage.
4. CHT sensor resistance measures higher than spec, but this should only make it run a bit rich, right? Ordered new sensor, regardless.
5. Plug wire resistance measures 5-6k ohms... much higher than the 3k spec in Bentley, but fairly close to Magnecor's resistance spec (2200 ohms/ft, IIRC). FWIW they are 8.5mm Magnecors, and they have lots of miles on them. But why would they cause such a sudden no-start condition?

Edit: I forgot to mention that I did try swapping out the DME relay.