I would check the fuel pump, there is a test jumper under the hood (can't remember where it is). I know you just changed it but you probably have some shortcuts in your main harness. That would explain how the car worked but died again.
Go there :
http://hmaservice.com/
and register, when you're logged in clic "Service Information" on the top left of the page.
From there you'll be able to select you car model and year and do a search (fuel pump obviously). In the result you should have instructions on how to test the fuel pump without openning the fuel tank.
Good luck!