[BC3004]

In the tank of your 6.0 you have a pickup tube- on the end of it is a plastic piece that commonly breaks. This causes 1/4 tank issues (truck will act like it is out of fuel). The HFCM (fuel pump) is on the drivers side frame rail just underneath the drivers door. Are you using anything to monitor fuel pressure? Minimum of 45 psi is required, recommended to have at least 50 psi in order to keep the injectors happy.

Yes I have an Edge CTS 3 to read all of that stuff. Need to check fuel pressure though. The fuel bowl where the upper fuel filter is located does not fill up at all when the key is turned to on position like it should if the fuel pump is working. And after getting down close to it the pump(HFCM) it makes noise like it is running and pumping but obviously not if the fuel bowl is not filling up? Next down the list would be pickup tube in the fuel tank or if the 2006's have the in-tank fuel pump as well? Any ideas? Could the HFCM be plugged?