The truck runs great and starts perfect when cool, but run it for a few minutes and it won't start once I shut it down.

I have replaced 2 lift pumps, 2 injector pumps, MAP sensor, and fuel tank pick up and filter, the only thing accomplished is messing up the fuel guage. Now I run out of fuel at a 1/2 tank.

A match and 20 gallons of gas are starting to sound good and cheaper. -

** Please post questions in the correct forum **



1) Do you have a fuel pressure guage - absolute must on a 24V. Truck shouldnt leave your driveway without it.

2) Stock lift pumps are junk - dont waste your money on them

3) Have you scanned for codes? -

Dr. Evil's Sig:

98 12V quad cab 4X4 AND 2001 24V quad cab 4X4

No guage, but will get one.
Code machine lights like a christmas tree, but did not get them from the mech -

Hard starts when warm are one of the classic signs of VP-44 failure. Notice and white smoke (when warm)??

Need codes if you are looking for advice. Good luck. -

need to check fuel pressure -

hotcummins's Sig:

12v 5x18s injectors 191 delivery valves 3k springs aroura5000 single i built the all billet tranny and ats 5 disc converter #100 fuel plate fire ringed arp head studs timing 22.0 degrees tabbed kdp quick spool cam and exhaust manifold 5 inch turbo back exhaust w/ 6 inch tip afe intake k&n cold air water meth injection airdog2 165








http://www.dieseldawgs.com/

codes are going to be a must. it sounds like the vp has gone bad. throw the stock lift pump away and get an airdog and a pressure gauge. -

nbaca's Sig:

2001 Cummins/NV5600/Twins/200hp sticks/all supporting mods. Built with Diesel Auto Power products. Call Jacob at 1-951-377-4844

http://www.southwestcoalrollers.com/

Hard hot starts are the classic 2nd step of the vp44 - first step stock lift pump fails then without pressure guage - the injector pump vp44 starts hard starting then soon wont start at all. Once you put on guage get an airdog or fass and you will be a happy man. BTW if you need to change out the vp44 (you will) I have the tool to remove it and will loan it too you if you promise to return it. It is really kinda fun to do but can be stressful too. Also the screen on the fuel tank pickup bottom is really restrictive - engineer something better- I used a much larger heavier duty screen after the aftermarket lift pump install. -

mxtuner1's Sig:

2006 Mega 5.9, Edge Juice w/Attitude+ HOT, add on pressure box, propane injection homemade, 98.5 24v mbrp 5in, ported turbo & BD ex man, propane inj, edge comp, autometer,40 horse vp44 Oregon FI, Billet low stall Redline convertor, Extra duty 47re with new steel input shaft, transfer tank 90 gallon in bed, homemade transmission cooler with added ats ddeep pan trans and cooler holds 7 gallons and 1 qt total amsoil synthetic atf

It was the VP44. Thanks all. I don't know why or how I got 2 bad ones in a row, but I know why I have a new mechanic. -

good to hear. glad you got the beast running -

Did you order a fuel pressure guage? -

Hot start problem usually point to a VP44 diaphram issue... Way to check is disconnect the lift pump power. If it starts easy then you know the fuel pressure is too great at start up. You need to build a lift pump relay to hold the power off during startup. -

Mopar1973Man's Sig:

2002 Dodge Cummins - Michael Nelson

is there any other way to remedy the diaphram issue other than replace the vp? -

crazycooter's Sig:

2001 3500 cummins (obviously) 115K on the clock, hell of a steal, but where do you find one of those without a few bugs? Everything is stock for now, but plan to change a few things... Still trying to shed myself of my 97 psd that finnally runs like she should. and not as good as a rough running cummins

Or you could do one of two other things:

download a smarty
relash the PCM at the dealer

Both of these will shorten the lift pump run time prior to starting, making it easier on the VP.
Smarty is free if you know someone with one you could borrow. Dealer is the last resort, of course. -

DeLuzGN's Sig:

1999 Dodge Cummins, Q/C, 4x4, auto w/ some upgrades (previous owner did something to the trans....), FASS hpfp w/ 1/2" lines, Isspro EV fuel, pyro, boost, trans temp, Smarty, power puck, AEM Brute Force intake with Amsoil nano-fiber filter, silencer ring MIA, straight pipe, corroded black paint, homebrew biodiesel.

No way to just fix the diaphram and on top of that the steel plunger was rattling around inside the aluminum?? cant spell" housing and this alows fule to pass by the plunger. Problem here is the timing of the vp is controlled by the fule pressure and since some is now sliping past you probley have a p216 timing coad. Iv talked to alot of places about their reman vp and the best iv found is blue chip diesel look them up and at least read what they have. all they do is dodge fule systems. i like to stay loyal to my locals but not with the vp i got -

make the pump only run with switch on and not while cranking. you can wire to a window motor since they stop when cranking. -

diesel pap's Sig:

www.mightydiesel.com - Make Your Diesel MIGHTY !