Engine/Transmission (1998.5 - 2002) second dead lift pump!

[dblake]

I think I just had my second lift pump go dead . It's only pumping about 3 p. s. i. ( I have a guage ) regardless of throttle position . The last one went out right before warranty so I had the dealer do it for free . Now this one's dead with only 3k miles on it .

I found my 50 Amp fuse for ignition /run blown and thought that was the problem . Changed the fuse with no improvement . Then I tried changing the fuel filter with no luck .

If anyone has any other ideas about what I could check I'd appreciate it . I think it's time for a FASS but really have the cash right now and don't want to drive it anymore the way it is . I already had to drive 100 miles to get it home .

Thanks a lot .

 

[RHARVEY]

Are you running an isolator on your gauge??? If you are you might check to see if it has air in the line between the isolator and gauge.

Yes I do believe its time for a FASS system...



Rick

 

[johncameron]

Are you running an isolator on your gauge??? If you are you might check to see if it has air in the line between the isolator and gauge.

Yes I do believe its time for a FASS system...



Rick

:--)

 

[dblake]

Rick , yes I'm running a mechanical isolator with antifreeze in the line . I'll check it for air tommorow since it's too dark now . If my memory serves me right I think there's another spot to hook up a mechanical guage to verify my guage is reading right . I was wondering if a fuel line sucking air could drop my pressure . I'll try those troubleshooting techniques tommorow . Hate to spend $700 on a FASS ( I plan to later anyways ) and find out it was only a guage or bad fuel line . But that blown fuse at the same time sure is a coincidence .

 

[RHARVEY]

The FASS II is less than $400... and that way you can run your fuel thru your stock filter and also save some $$$$



Never did have any luck with those isolators. Have always installed a needle valve inline to buffer the pusations of the lp. Close the valve closed and then crack it open just enough to see pressure.

Also I never put the fuel gauge in the A-pillar... It always goes down in a single mount just above the left edge of the trans tunnel. That way if I notice any leaks... its easier and faster to find it. .





Rick

 

[johncameron]

FASS II. that's what I'm running. I wasn't convinced with the air-separator thing.

 

[dblake]

Well , I talked to my local dealer today and I think I'm going to have them do the retrofit to the in tank lift pump under warranty . Then I'm going to buy another old style cummins lift pump and plumb it in line in the stock location . That way I've got a pusher and puller . Then I'm saving my cash for a complete FASS unit to install later as my primary pump with the Dodge stuff as a backup . May sound like overkill , I know , but with 3 pumps I think I'll finally be safe !

 

[Cummins724]

Holley blue pump only $100. pumping 15psi. idle 10psi. wot. & that is the only pump i have factory lift pump gone, [$75. fuel lines & fittings pump to tank, all 3/8"] pump is wired to stock wiring for lp. [ no hard starts]

 

[dblake]

Cummins 724 Where's this Holley Blue Pump ? I've really only seen the Fass, Rasp, the Vulcan stock lift pump relocation kit and a few others that I can't remember right now . I really like the look of the rasp with all the new lines from Power by Poole but it's pretty pricey . Today my dealer told me my VP-44 is toast but when I took it to him the LP was only pumping 2 p. s. i. ? I'll take the new vp-44 but if it's still pumping 2 p. s. i. I'm not leaving the dealer till he replaces my lift pump .

 

[Cummins724]

The holley blue is the fuel pump used in the Bullydog Big fuel kit, In that kit you get the 3/8 fuel lines, fittings, pump, wiring etc. for $230. or so from summit. I just bought the pump lines etc. and made my own setup similar to theirs, but you can buy the pump from summit, advance auto, auto zone, for $100. & just splice it into your line by the fuel tank. You should get a bigger line from the pump to the engine, like 3/8 or so, cause new word on the street is volume, not pressure. As for the Holley Blue pump it pushes 110 gallons per hour of fuel, so no more worries about volume.

 

[Huff N Puff]

The holley blue is the fuel pump used in the Bullydog Big fuel kit, In that kit you get the 3/8 fuel lines, fittings, pump, wiring etc. for $230. or so from summit. I just bought the pump lines etc. and made my own setup similar to theirs, but you can buy the pump from summit, advance auto, auto zone, for $100. & just splice it into your line by the fuel tank. You should get a bigger line from the pump to the engine, like 3/8 or so, cause new word on the street is volume, not pressure. As for the Holley Blue pump it pushes 110 gallons per hour of fuel, so no more worries about volume.

The source of the problem,is in the tank,the fuel module is to restrictive,the only way to increase the volume,is to install a bigger line in the tank or put the pump in the tank. Mopars part # is 05175538AA.

 

[Hahn007]

Have always installed a needle valve inline to buffer the pulsations of the lp. Close the valve closed and then crack it open just enough to see pressure.







I finally went with a liquid filled gauge to dampen the pulsations. A regular (undampened) gauge allowed to fluctuate will quickly fail and give erroneous readings. Never thought of using a needle valve, good idea.



Chris