I have a '90 full size bronco. 351 fuel inj. eddie baur. I don't have power to the inercia switch or to the fuel pump. All of the relays have been repaced and also put a new "brain" in it. With the new computer "brain" in it the fuel pump worked for about 2 seconds then back to nothing. Has anyone had this problem or know how to fix it? Please help. Thanks!!!!