quick thought from my exp. did you pull the dist cap and watch the rotor spin while cranking engine? My 2000 has no dist but the cam sensor sits on what would be the dist shaft/oil pump shaft and the gear on it locked up. sheared the gear teeth off no spin no spark after that, but would crank all day

 

Update:

Replaced the computer today and IT FIRED UP! Here's a summary of the ordeal:

Jeep had been running smoothly for a year or better with no symptoms of anything failing. Parked in my driveway one evening – next morning, would not start. Cranked just fine, but no spark.

I changed the Crankshaft Position Sensor, the Cam sensor (under the distributor), and the ignition coil. Still had nothing. Then a buddy helped me discover that I had no 12V to the coil itself. I cleaned plugs. I put dielectric grease on lots of parts. I checked fuses and relays. Then tonight I replaced the computer. Eureka!

I guess it makes sense, looking back. With no signs that any particular part was wearing down – and then to have a solid no spark issue out of nowhere – I should have looked at the computer earlier. Hopefully someone finds this helpful should they be in the same crappy situation.

Thanks guys!

 

Glad you got if figured out!
JW

 

I'm glad it's resolved and you have your Jeep back! I'm just trying to parse the whole ordeal and figure out what could have been done differently to avoid the unnecessary parts, effort, and time. Is there anything that could definitively allowed you to skip to the correct diagnosis.

I'm actually kind of impressed that you didn't jump right to the computer at first, like many do, because they don't understand it. But what about this type of case where it actually is the component at fault. Hmmm.