meteor gb 85 problem

[bill flyer]

hi to all , my problem is intermittent stopping i can start the car everytime on startup in the morning then go down to the shop maybe 5 minutes away. then go to go home and it will not start after a period of time maybe 30min or so turns over and starts no problems . it was suggested that the ignition module was faulty so i replaced it but to no avail the same thing happened stopped again has anyone had similiar problems any ideas where i should start looking coil? relays? etc as this is becoming quite annoying thanks to all