HELP!! Can't get fuel prssure down from 50psi

[SHEPP2]

First off thank you for your reply's I'm up the -6 fuel line I just don't know where to start. If you can give me the steps I'm on it.....I tried to un-hooking my hot wire to lower the volts to the pump which worked did drop the fuel pressure which I did get the pressure to 43 psi. Later on last night headed home it cut off while driving so I'm up for whatever I need to do.....