Re: I'Why do I keep blowing the fuse for my fuel pump?!?! (JBRONCFAN)
actually if it were your cat, or anything in the exhaust, you likely couldn't get the car started.
The fuse blows because of too much current being drawn across it. If it dies suddenly while driving, that means the pump had to suddenly work really hard, or the wiring shorted. Get a fuel pressure gauge, hook it up, put in a fresh fuel pump fuse, and then bypass the fuel pump relay. The pressure should come up and stay there. The system will keep pumping like that and just circulate the fuel around. watch the pressure for variations. Let it buzz for a while and see if the fuse blows just sitting there like that.