My Cavalier 1.6 Wont Fire Up ?

My Cavalier 1.6 over head cam wont start i gt it about 2 weeks ago andit started up fine had it running for about 1 hour . but it was realy slugginsh now it wont fire up but the dizzy cap is only fireing on 2 . all the leads are fine and in the right order .. but i dunno if its just the dizzy cap ..