1993 GMC K3500 Sierra SLX 8Cyl6.5L - Engine
fuel problems keeping up with injecter pump
have fuel in tank but in line fuel pump will not keep up with main fuel pump . I have changed fuel filter hoping this would help but it only runnes for little while . i have the pump on a bypass switch and it pumps fuel but it keeps running out of fuel on the hiway. I have tested every thing that I can without putting a new pump or dropping the tank.