its a corroded hole in the pipe. its up closer to the headers but its not the headers. i just heard it and got up under there and saw the whole. i cant figure out whats causing my problem with acceleration and what not. it has all the signs of a bad fuel pump, but if it was the pump it would have gone out a long time ago this is something that happens just every now and then and ill peg it, get nothin, then it well just take off and its fine. i dont know whats up.