95 corsica won't start

I have a 95 corsica. It would take a few cranks in the A.M. to start,but would run fine when it did start.If I drove it for a while and then shut it off for more than a few minutes it wouldn't restart until the temp. gauge was almost on cold. Now it won't start at all.No spark, nothing ! Is there some kind of heat sensor that could cause this ?