Here's a schematic diagram from the web site in my sig.
The power to the fuel pump relay comes from the main relay and as you can see the jumper you used bypass the FP relay and FP fuse.
The ECU controls the FP relay - it should come on when you turn on the IGN switch, but if the CU does not see engine running within about 30 seconds it will take the power off.
Best to trace the power though using the diagram.
Although the fuel pump is capable of a fairly high discharge pressure, it doesn't have such a high flow rate - best to measure the rail pressure.
You could have a plugged main fuel filter or the pump suction strainer - most often the problem lies with the main fuel filter.
Quality and not quantity counts.
Sig image is 500X100 at 11.7 kb