Hyundai Tiburon Fuel Pump Not Working

How Can You Tell If Your Fuel Pump Is Bad Or Your Sending Unit Is Bad?? Is There Any Other Way To Get To This Stuff Decides Dropping The...

I Have A Hyundai Tiburon That Will Not Start The Dealership Repaced The Fuel Pump And The Fuel Filter And The Fuel Pump Realy And The Ecu. I...