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Dumb question here. Are you sure there is fuel in the tank? Did you confirm the rod is rotating? As a FYI, genuine Cummins lift pumps are made in China. I have trouble believing the pumps in your link are genuine Cummins however, regardless of the box they come in. I would run from a $27 lift pump.
 

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1994 ram 2500 2wd
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Discussion Starter · #22 ·
The pump in the link is not genuine Cummins. The genuine Cummins pumps average $50 to $60. At least the box says genuine Cummins. There are a bunch of people selling the genuine Cummins pumps. Have 3/4 of a tank. So fuel is not an issue. I never let my tank go below half full. I will double check to make sure the rod is rotating. I think that it is. I took a close look at it after removing the FSS.
 

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Have you checked the prefilter screen?
 
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Did not know there was a prefilter screen. Where is it located?
 

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1994 ram 2500 2wd
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Discussion Starter · #27 ·
Read Joe G's again. Then I found a detailed description with pictures on how to clean/replace the prefilter screen including part numbers on the Dieseldatabase forum. The Cummins/Fleetguard Part number is 3845400-s. Another task added to the list.
 

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1994 ram 2500 2wd
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Discussion Starter · #28 ·
The prescreen filters seem to be in short supply. After a bunch of searching I finally found one and have it on order. Have made an offer on a lift pump. Should have both sometime next week.
 

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You can just wash out the prescreen filter. They aren't meant to be replaced unless torn. I don't know where you're located, but even in Fairbanks AK (or maybe because of Fairbanks!) I was able to get a Cummins lift pump from a local truck shop (big truck/trailer type shop). I personally wouldn't waste time on a potentially iffy lift pump, buy (and install) once, cry once. Especially if this is your transportation.
 
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1994 ram 2500 2wd
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Discussion Starter · #30 ·
My local O'Reilly's has one in stock for $160. I am getting a genuine Cummins according to the box for around .$50. I bought the prefilter screen kit to be on the safe side. Won't know what shape mine is in until I take it apart.
 

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Did I miss something? You said $160 at O Reileys and your getting a genuine cummins for $50?
 

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Did I miss something? You said $160 at O Reileys and your getting a genuine cummins for $50?
You missed the e-bay ad showing a pump positioned on a Cummins box and my post that if it is a genuine Cummins it is stolen.
 
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Boxes are easily counterfeited, and counterfeit auto parts are a big problem (please do some reading on the subject). You are not getting a genuine Cummins LP for $50. I wouldn't risk putting a knockoff on and potentially adding to the problems.
 

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I guess I have been doing it wrong all these years, I just change the filter, leave it loose and pump the lever on the lift pump until fuel come out of the filter, then tighten the filter up and no issues. Have had the lift pump go out, it still ran just seemed weak. new lift pump, loosen the filter and pump the lever till that pesky fuel spills all over and drive away.
 

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I wondered about the lift pump. Thanks for the suggestion. They are not expensive. I have also thought about going to an electric pump. But I have to get my truck running. It is my only vehicle. If I crack the banjo bolt on the injection pump and crank the engine I get fuel coming out at the banjo bolt. I don't think that would happen if the lift pump was faulty.

Batteries finally came up to full charge late this afternoon. I will be back at it tomorrow morning.
Check fuel pressure with guage at filter to check lift pump.
 

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Whatever lift pump you get, make sure it has a weep hole so if it develops an internal leak the fuel leaks to the outside rather than into the crank case. Some of the aftermarket pumps do not have this hole. I had a bad lift pump last year on my '95 and bought a new one from a vendor recommended on here. I installed it, it appeared to be working fine but after many attempts I could not get the engine to start. After giving up, I had the truck taken to a local shop and they had the same results. They thought that there may have been a problem with the LP, so they got one from NAPA, installed it and it started right up. The vendor did the right thing and refunded the cost of the faulty pump. Good luck with your situation....you'll get it figured out.
 

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1994 ram 2500 2wd
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Discussion Starter · #37 ·
The listing on the lift pump I bought said it had a weep hole. Went to install it today and can't see a weep hole anywhere. Sent an email off to the seller. Did some more checking on other listings and only saw a couple of pumps that appeared to have a weep hole. A $152 Delphi pump and the $75 DCEC pumps. The only visible difference between the pump I got and the DCEC pumps is a small hole on the front side of the pump by the mounting flange.
 

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1994 ram 2500 2wd
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Discussion Starter · #38 ·
And since I had the fuel heater off I replaced the prefilter screen. The old screen did not look dirty but it wasn't as clean as the new one. There was fine grit in the bowl. What really surprised me was the housing was barely finger tight. It came off with no force at all.

Back to the lift pump. The box it came is printed in numerous places that it is a genuine cummins part.
 

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So you didn't get a genuine Cummins? The weep hole is circled.

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