hi carymcooper
on my 1988 300 SE, I am also having problem with crank but no start, and like you I replaced crank position sensor, my crank position sensor wire looked bad and insulation on the end where it goes into crank was oily so I replaced it and the result was no start, I know it is not fuel problem, when I was testing for spark, initially I was getting very weak and not always, now it is not even sparking at all, my question is, was your coil also bad as well as your ignition module?, I am looking around for a good used ignition module, any help on a location for a used module is appreciated.
thanks