1992 Chevy Lumina WONT STAY STARTED RUN 10-30SEC ONLY

I start it and it die out after 10 sec it wont start till I turn the key to primer it. IT WONT stay on longer then 30sec I can ican hear the fuelpump my vacum line are hook up it look like it is getingto much gas in the rail I push the rel vale and car will start sometimes it run fine then it dies out after 2min or3 it then run rough spark plugs gap right new wires r right fuel my vacum line might be wrong I have abook but it dot show anything to make sure it was runing fine I was going home and it died I pushed the releas on the rail and drove a block and it died idid again and got me home it start sometimes and then it wont till I rel gas out of rail when is runing I smell like gas from tailpipe THANK U FOR UR HELP