Archived Fuel pump 24V

[hcpBILL]

I changed my fuel filter. When I bumped the starter to get the electric pump to run I heard nothing. I bumped the starter again (longer) the engine started and ran briefly and died. I still did not hear the pump. I have bumped the starter many times and still no fuel pump sound. I have changed the filter before and had no problems, just bump the starter several times, let the pump run and it will start after a few trys. The fuel pump was changed last year by the dealer under warranty. The truck ran fine this morning before I changed the filter.

This truck is an '00 3500 2wd 235hp

Where should I look?

Thanks for your help.

Bill

 

[Bob Wagner]

you need s fuel pressure gauge every 24v should have one

 

[lmills]

A lot of guys have been having this issue with weak lift pumps. The run and drive fine, then when you go to change the filter and bleed the air, they won't start. The lift pumps just die, that quick. If you don't hear the pump running when you bump the starter, it is most likely gone.

 

[hcpBILL]

Lift pump

When the pump was replaced last year I checked the part number on this site. It was the latest one. I have less the 10,000 miles on it.

Is there a pump available that will last?

Thanks

Bill

 

[lmills]

Unfortunately as long as it has to draw the fuel from the tank and not push it, it will always be prone to failure. The best thing to do to avoid this issue is to always keep your tank above 1/2 tank and install a pusher.



My factopry lift pump made it to 75,000 miles. It was starting to get a little weak so I installed a secondary pusher to feed it. At 90,000 miles I am still running the factory lift pump. 18 psi at idel and 12 under WOT

 

[hcpBILL]

I tested it -

I pulled the pump. Voltage to the pump is fine, bump the starter and 12. 6 volts for about 20 seconds. Then I hooked the fuel pump to a battery in the garage and it seems to work fine. I admit this is not a good test since there is no fuel and hence no load. I re- installed the pump without hooking up the fuel lines just to be sure the circut was OK and it is. Bump the starter and it runs.

I will replace this one and add a pusher in the near future. The ironic part is the tank is full. There should be little resistance. I will check the fuel cap too. I assume if it is not venting properly a warning light will come on.

Thanks for your help. All I need now is the part number for the pump. I doubt the dealer wil do this since I have already taken it apart. I will search this site for the part number.

Thanks again

Bill

 

[rweis]

I think I have read a couple of guys pressurizing the tank when they have had a hard time getting the lp to pick up fuel.



Air pressure and a rag to sort of force the fuel to the pump.



Might be worth a try, no cost either.



I put my lp down by the tank, but that is a totally different solution.



Bob Weis

 

[Loren]

Bill,



Others here will know for sure, but I don't think the tank vents through the cap. I'm pretty sure that the vent is at the fuel tank module that holds the fuel quantity sensor and all the fuel lines.



Loren

 

[rashwor]

Correct...

the cap is air tight. The factory vent is part of the tank cap assembly that contains all the fuel lines and such going into and out of the tank.



I made my cap so it is vented now because the factory vent on the tank kept stopping up with mud.

 

[dcscott]

I'm about due to do my first fuel filter change on my '03' so read this thread with a great deal of interest. As I was reading the various posts I kept wondering why nobody was prefilling the cannister. Whenever we change fuel filters on a marine diesel we alway handfill the cannister before buttoning down the lid.



Curiousity got the better of me so I called my son who is on his second Dodge Cummins (2000) and asked him how he does his filter change. Sure enough, he fills the cannister about 1/3 full, puts the filter in and lets it soak for a few minutes, and then tops off the fuel filter before putting the lid on. He claims he's never had a lift pump problem on either rig, never has any difficulty getting them started after a filter change, etc.



Any pro's or con's to prefilling the fuel filter????



Thanks - Dale

 

[CFAR]

If you are going to prefill the cannister I would put the filter in first. I believe the outside fuel in the cannister is unfiltered, the filtered fuel goes into the black tube coming up from the bottom of the cannister, so if you prefill or pull out filter without draining there is a chance of stuff getting into the holes in the black tube and from there straight to the vp44. I drain then bump the starter, I used to have problems with my last lp (#2), I would have to pressurize the tank. I think when the lp's get a little wear on them they will not suck "fuel" that far. I had the same problem hcpBILL had the lp will not run after a fuel filter change, don't know why, maybe air pressure.



Correct me if I'm wrong.

 

[mcoleman]

I went to change the filter on my truck and found that when I turned the key to on nothing happened. I had to get the truck started to get to the local Cummins dealer so I simply pulled one of the brass plugs on top of the filter canister and poured diesel in until the canister was full. The truck fired right up. So far the replacement lift pump has close to 20,000 miles on it with no problems. But I do have a gage and will be adding a pusher pump to go along with a set of DDIII injectors.