1992 Astro distributor problem

I have a 1992 astro with a new type of problem. it wont start after it warms up. replaced fuel pump which was not bad and filter, than changed plugs, dist cap and rotor, started and ran ok, now problems again, it will stall out I can get it started if I push on the distributor cap and start it. I am not sure with this. need help never seen a problem like this

Perhaps your rotor button isn't contacting the cap well. the hold down screws may be lost, loose or broken, you may need to replace your cap and rotor button.

Found the problem it was my modular sensor on the distributor replaced it and no problems anymore