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I thought you would like that. Unfortunately no Bosch or Mitsubishi lift pumps found... any idea where the Delphi pumps are made? From what I’m reading it sounds like the Cummins OE replacement pumps are made in Jhina?

Shhhh... I’ve been playing in the diesel fuel so much lately, she cant smell it anymore either. I’ll get some pics of the garage later, but heres some goodies my wife made that I can send you.The kids say you can barely taste the diesel. Back to the lift pump, any recommendations? I don’t want...

This is fun! I gravity fed directly to the lift pump, from a fuel can, still no change in pressure. I would think this should eliminate trash in the tank, collapsing fuel lines, or sucking air. I hooked the trucks fuel line back up to the lift pump, and checked the flow at the inlet to the...

Anythings possible, lines “look” new, and there are other clues that they have been replaced fairly recent. If it gets to checking for that I will likely do as Will suggested and check how much suction is on the inlet side of the lift pump, before I replace them.

So, I got both filters changed with no improvement. Checked the turbo hoses, found no leaks but look like replacement needs to be put on the to do list. Swapped out the lift pump with the “newer looking” Carter from my parts truck,no change in pressure, but the pressure is much slower to...

Yeh, I should probably check that side to, but the loss of prime and low fuel pressure lured me toward looking at the fuel. Last night I had the boy watch my gauge while I pumped the primer and was getting 25PSI, so I’m really suspecting the lift pump, plus maybe the overflow valve for a few...

Replaced the primary canister filter today, it did have quite a bit of junk in the canister but the element looked pretty good. No change in pressure, secondary spin on pressure filter will be here tomorrow, not expecting much. Will probably try feeding the lift pump from a bucket for the heck...

Baby steps. I’m slow and cheap!

Well that didn’t give me the results I was looking for... I swapped my in a used overflow valve of unknown condition, went from 17psi down to 7, put the old one back in, back to 17psi, ordered up another set of new filters before I mess with anything else.

Running more like 10-15psi on the road. Guess I’ll start by switching out the overflow valve and see what I get.

Hey Will, any idea what the minimum gallery pressure is? I lost prime after sitting for about a month. Now I seem to be slightly lacking power, only at WOT, and also lost about 5 mph off top speed empty on the highway. I have not had any more loss of prime, runs smooth, fuels clear and clean...