You could be leaking somewhere such as the injectors/fuel pressure regulator or the fuel pump check valve
Thursday, August 11th, 2011 AT 8:37 PM
What is the fuel pump pressure?Low pressured?
Thursday, August 11th, 2011 AT 8:47 PM
This truck uses a variable pressure, computer controlled fuel pump so you need a scan tool to be able to determine if the pump is responding to commands correctly and the pressure sensor is reading properly.