92 lumina wont start

92 3.1 lumina car wont start, it turns over fine but wont start. it was not getting spark so a few days ago i put an ignition module in it and it started fine. two days later it did the same thing would not start, but the next day it started fine but tonight it would not start again...i checked the coils with a multimeter when i replaced the im and they were good...any ideas?

check for crank sensor signal getting to ignition module....assuming it is stlll a no spark issue.