dart quit whats wrong?

It comes down to spark and fuel.If you ampell fuel supply there look for spark and the quality of the spark.If you have no spark,do basic checking,does the coil make a spark and the quality?does the rotor turn,is there spark going to the plugs or only into the cap.Do you have voltage at the MSD unit,grounds,you do your system checks one by one.Is the charging system working and the battery fully charged.Check simple things,ballast resistor,control unit,coil,wiring connectors etc.Mrmopartech