[LMP]

It seems like it runs a few seconds on the "prime" fuel then lacks injector trig. When mine failed a few years ago, it would act nearly like that....that is, it would run for less than a second each time. The problem was loss of 3x crank signal (needed to trig injectors on start) ..it comes from the crank sensor but this signal runs through the ignition module and in my case this module was the culprit. Yes, there is a possibility the crank sensor is at fault....but I have a scope to test signals, I never work blind, so I cannot categorically say this is your problem. HOwever, I have often suggested the crank sensor and the ignition module at that age, are just waiting to let you go in the middle of nowhere and have suggested to have one as a spare ...better yet, change the crank sensor to be sure and keep the other as a spare....just in case. (I read you have changed the ignition module).
The sensor is around 69$ new on ebay ...but you must rent a puller and come with a lot of patience to extract the engine balancer...and just removing the balancer bolt needs a hefty impact socket and torque bar....a nice shot from a fellow forum member is to brace the torque bar steady somewhere with the socket in place on the center bolt.....and then kick the starter for half a second.....
....ok..these were my 2 cents....