I am currently working on the same problem--in my case the problem boils down to the coil on the relay is pulling in and out, and as it happens, if you place a jumper across the contacts in place of the relay (bottom left pin hole and top right pin hole) the fuel pump and car runs perfectly. (For troubleshooting the issue only) In the underhood fuse box, I have found a burned off coupler pin. I am in the process of identifying just where that is from, and I suspect that the problem lies in that area. It CAN be caused by a lack of crank sensor signal to the pcm causing the pcm to interupt the circuit to the fuel pump relay, but the research I have done so far points to a power distribution problem--when I identify my issue, I will Post again--I too will appreciate any input relating to your experiences. Thanks and good luck.
Friday, February 17th, 2012 AT 8:10 PM