I have been chasing a problem around my Regal for a few days now. Went through all the engine codes and replaced all bad sensors. I can start the car, but it dies shortly after. You can hear the fuel pump running with the car, as soon as it stops the car dies. I changed the fuel filter to find the car runs for a little while longer before the pump kicks off. I found the relays warmer than I felt they probably should be, so I changed them both (f/pmp, and f/pmp spd cntrl relays).
If I start the car and give it a quick snap of the throttle the pmp will stay on and it will idle, but as soon as you touch the throttle the pump turns off and the car dies. Any help is greatly appreciated.