Car will not start new fuel pump and it will start with staring fuild

Hello, if fuel is at the fuel rail ready to deliver to the engine, you would not need starting fluid. Starting fluid is emulating fuel. Are you using a fuel pressure gauge at the fuel rail to take key on, engine off readings? Why did you replace the fuel pump in the first place? What testing was performed and what were the results?

Insufficient fuel pressure - - no injector pulse - - contaminated fuel