did you check on your new fusebox to make sure that all of the fuses are correct? And not blown? Double check EVERYTHING you have touched... it may be something little and simple.

Don't actually turn the car OVER to her the pump... just turn it to the II position (like you would to turn your radio on). You should hear a low hum/buzz that's the fuel pump priming.

Have you checked your starter/injectors/spark plugs? If your car just randomly stopped running, there's a plethora of things it could be.

I would check your injectors to make sure they're clean, especially if it's not staying running without added gas.

Where exactly are you spraying the gas in?