Cadillac Repair: 92 Cadillac Seville wont stay running, cadillac seville, first 5 minutes

Question
Our '92 Seville will start and stay running for about 5 minutes then dies and won't start again for several hours.  We have replaced the coil and ignition module.  Any suggestions before we pour more money into it?
Thanks

Answer
IS or HAS the CHECK ENGINE light ever illuminated on the dash while driving the vehicle Or does it com ON when the engine does start for the first 5 minutes ?.

When you try and restart the engine after it stalls out are you getting ignition to the spark plugs ?.