Fuel injection fuse keeps blowing. 2004 comp g

I have a 2004 Grand Prix Comp G. The 15 amp fuse for the fuel injector fuse keeps blowing as soon as I try to start the car. I looked at the injector wires and under hood wires in general and could not find a loose or damaged wires. The battery is new and grounds are good. So far The only way it stays running is if I put a 25amp fuse in it. This issue just happened out of nowhere, it died while driving. Any suggestions??? Thanks