06 duramax, running out of fuel

[kbturbo]

Do most of you guys change the pumps, or can I add more pressure through the fuel pressure tables, to get more out of the pump?

[Dashman]

I'm not sure, but as you know, the pump is the weak link. Here's what I would do: Bump up the entire command fuel pressure table by 10 or 20%, then scan the fuel pressure with a histogram, then check to see how far off the scanned histogram values are from the commanded table. You could setup a spread sheet, put the command table on sheet 1, the histogram values on sheet 2, then setup sheet 3 to calc a percent difference. At least then, you could see exactly what the maximum pressure the pump can sustain, and at what RPM you're needing more pressure. If you're willing to try it, I'll setup the spread sheet for you. Let me know.

[backchannel]

Do most of you guys change the pumps, or can I add more pressure through the fuel pressure tables, to get more out of the pump?

crappy system before the pump....lift pump helps

[xKILLORADOx]

lift pump for sure

[03 D-max]

Do most of you guys change the pumps, or can I add more pressure through the fuel pressure tables, to get more out of the pump?

you can up pressure through the tables but it wont do any good because at 25k your FPRV opens to release the pressure, first thing to do would be a lift pump and then if that isnt sufficient you can either upgrade your CP3 or you can add another one