Erratic fuel pressure - TDR Roundtable

Erratic fuel pressure

05-17-2005, 01:45 PM

#1 (permalink)

hcpBILL

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Join Date: May 2001 Location: Longmont Colorado USA Posts: 91 Photo Gallery

Erratic fuel pressure

My fuel pressure from the lift pump is getting erratic. Has been as low as 3 pounds but is jumping around. No loss of power, boost and EGT is normal, even at 3#.
I am on a trip and have another couple of hundred miles to go today. Pressure is a bit better with a full tank of fuel, 4-8 pounds. Can anyone guess how long this LP will last? This lift pump has about 10,000 miles on it, the truck has 49K. When the last one failed I did not have a pressure gage on it so I have no idea how long they go once the pressure starts to go up & down. When I installed this one I was told it was the most up-to date unit, cummins part number ending in "105". Is there a better one?
Thanks for the help
Bill

__________________
'00 3500 2wd ETC DEE Patriot Blue
Lower 2" front 4" rear
Westach boost/pyro
275 injectors, 4" Jardine

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