1989 Chevy Celebrity 89 Celebrity cranks but wont start

Engine Mechanical problem
1989 Chevy Celebrity 4 cyl Front Wheel Drive Automatic 180k miles

I have an 89 Chevy Celebrity that started having problems starting several months back. Drive it, turn it off, then car would crank and sound like it started, but it wouldn't catch. Sometimes it would start right up. Then you'd drive it for 10-15 minutes, turn it off, and when you tried to start it again, problem was back. Once I was driving up a hill, felt it stutter a bit, then car just shut off. Coasted to side and same problem. Cranked over but wouldnt catch. Had it towed and then later that night started up. Very random. Happened again last week and now car won't start up at all. Always cranks over but doesn't catch. Car has a spark.