Hi- My neighbor has a 1995 Toyota PU - It will run

Hi- My neighbor has a 1995 Toyota PU - It will run cold - gets warm or hits a bump - it likely will stop dead. It blows the 15AMP EFI fuse. He has replaced fueld pump and ran new electwire to fuel pump. Checked out the ''brain'' (engingControlModule). Still shuts down when heated or hits a bump??? He replaces fuse, is able to run then pops the fuse again, and again - Frustrating - anyone know the solution?? or Idea? Thanx Jay