no start has me stumped

92 cherokee 4.0 aw4. yesterday i went to start her up and fired up for about 2 seconds then died. didnt bother me too much does every once in a while, but this time it just cranked and cranked and cranked. checked cps, and i was sure it was bad. put a new distributor and no change (luckily i needed a new one anyways). put a known good CKP in it, no change. i have checked both of these sensors. good 5v input sensor wire has 0.0 ohms to PCM for both, good grounds. ignition coil has 12v supply. primary windings have about 1 ohm, secondary have 6.9 K ohms. i realize this is slightly lower than specified, but i am not convinced this is the problem. its been running great up until this. all connectors seem in good condition. as far as i can tell there is no spark but i was checking this in bright sunlight with a screwdriver in the coil wire up next to the cap tower. i might try checking this differently tonight. fuel pump is priming and i have pressure and fuel spray at the test port.

have i overlooked something or is the problem staring me in the face? im unsure where to go from here and the last thing i can think of is the coil or the PCM. what do you guys think?

Did you have the distributor in proper timing? What did you do to insure this? Did you check for spark coming out of the coil?

yes im sure the distributor is right. i scribed the the block with the metal rotor end perpendicular to it when i took it out, exact same when i out back in. i tried to check the spark earlier but it was bright and hard to tell. i checked in twice and could swear it had no spark from the coil but i was going to check it again now thats its night

just checked again definitely no spark. im beginning to suspect the coil is getting an open somewhere maybe when voltage is applied. all wires and grounds to it are good.