Car wont start, no fuel pressure, dont here fuel pump

Changed fuel pump checked fuses changed fuel filter. Car ran for 5 minutes and was turned off. Tried to restart and could not here pump and it would nt start rechecked fuse and it was ok has gas and I do not feel it is a faulty fuel pump as I already experienced 2 of those and this one was working wondering whether it could be the fuel relay there is no fuel pressure now of course as the pumps not working could you please tell me where the fuel relay is and also give me any of your wisdom on this problem.