I have a holley hp150 electric fuel pump that keeps on blowing the fuse in my new painless harness. When I first got the truck on the road it was fine but now 1 week later everytime I get on the gas a little it blows the fuse. When its parked and I rev it to 5500 its fine but in drive and I hit 3500 it blows. The harness came with a 15 amp fuel pump fuse and the third time it blew I was on the road and had to use a 20 and it blew just the same. Any ideas on what I should check?
Thanks

most people that i know who run electric fuel pumps run them off relays
you should also check for a bad ground connection

and the fuel filter(s) too.

clogged fuel filter is a good idea also if you used rubber hose it could be collapsing under load