starts but doesnt run NEED HELP(1989)

my 89 chavy cavalier z24 start up and runs for about 10 min but then it dies. confused dont know whats wrong can anyone help.??? Or any suggestions or direction I need to go to solve this problem.

I don't know a whole lot about vehicles but it sounds like your alternator isn't keeping your battery charged. Could possibly be battery conections need cleaning.

You need to determine if you are loosing spark or fuel when it dies.