Check to insure that you are replacing the fuse with the same fuse size and type (fast blow fuses don't substitute for slow blow.) If this is ok the either the pump relay or the pump is going bad and drawing too much power for the fuse to handle.
The fuel pump is shorting out and that is why the ecm fuse is blowing .Disconnect the the fuel pump and try it again,if the fuse blow's again then it is not the fuel pump.
Short in the wiring or a bad fuel pump.
Fuel pump
Short in wiring, relay or pump? internal problem in fuel pump.
Failed fuel pump, or a short to ground in the wiring to the pump.
you need 30 pus
start by checking for a wiring problem or possibly a bad pump
You have a bad fuel pump or the wiring to the pump is shorted to ground somewhere.
the fuel pump tank wiring is faulty at the pump
You have a bare wire that keeps shorting out & blowing the fuse, I had the same problem. The wire is the one that runs from the fuse to the fuel pump. The casing has melted away and now the wires are touching.
Probably a bad fuel pump. Disconnect the wiring harness at the fuel pump and put in a new fuse. If it doesn't blow and you have 12 volts at the pump with the key on, replace the pump. If your fuse still blows, you have a short in the wiring somewhere.
The wire may be shorted to the frame.