Car wont start

We had trouble with the car starting and running so we took it to the dealer and they said the fuel pump is dead. So after replacing the fuel pump it ran for about a week then stalled. Later that night after getting it towed I tried to start it and it ran. The next morning on my way to work it stalled out after about 5 min of driving and hasn't started since. I'm getting spark and fuel pressure but not getting fuel into the throttle body. I've been searching and found that theres a oil pressure cut off switch and fuel pressure regulator and a distributer module could be the prob. Any ideas of what it could be or how to test what it could be?

Thanks

Jon