I have this posted in the 4th gen forum as well but thought i might get more feedback and possibly an answer if i posted here:

when the crank sensors are unplugged the engine will crank evenly and smooth. once i plug the sensors back in, it will crank rough but not start. we have tested every wire in the engine bay and found a fault but i cant seem to figure out what exactly is going on. even if i jump the wire between the 2 signals, there is no continuity in the wire. How can there be no continuity in the wire if i am getting signals from both ends!????!?!??!?!?

 

bump, anyone in the general discussion know why this would happen or can give any advice on what is going on there? and how i can get my 4th gen running again?

the only thing i havent done is check the flywheel or r & r the tranny and for that money i can get a slightly beat up but stong running 97.

i have 5 days left to figure this out and if there is a failure to launch, shes going to be taken apart and sent to the scrapyard

 

What is your tachometer doing during the start up process?

Have you tried swapping out sensors with another working one? Tried your harness on another car?

 

swapped all 3 sensors with brand new one. same result

i have been thinkin lately and am almost positive it is still a grounding issue. i have been reading posts alllll day today. i have read threads saying to add ground wires in the past and did add some to my car, but i dont think it was enough. i want to try adding one from the starter to the bottom of the bell housing and double check the battery ground because i didnt look at the entire cable.

im going to put another gound wire to a bolt on the bellhousing, clean the paint/coating on off all the tranny bolts, add dielectric grease to all the bolts and re-torque the tranny bolts. this should completely take care of all grounding issues.

i have faith from this thread, my symptoms are identical: http://forums.maxima.org/4th-generat...verything.html and look forward to posting some results monday nite.