Save your $1500 VP44 injection pump!! Stock fuel pumps on these Dodges are aweful, and their solution, the intank pump, isn't much better!
My 2001 had the LP replaced with the intank module
I was seeing 7 psi on idle, and as low as 3.5 psi on WOT
I ordered a Draw Straw II, big line & FP relocation kit from Vulcan.
Here's the install. Took about 4 hours time, nothing too difficult. Vulcan didn't include hose clamps for the fittings, so I bought these - just to be sure.
The pump is a Cummins Campaign pump, NIB
1. I drove down the fuel level as far as practical, especially given the intank pump, we siphoned out the rest. I got down to less than 1 gallon left
2. Reaching behind the rear quarter panel, I loosened the hose clamps and remove the fuel filler hose from the tank to the gas nozzle, and the other hose. Left these loose.
3. Then loosened the (2) 15mm bolts holding the fuel tanks straps in place
4. Lowered the tank, unhooked the electrical connection and the (2) fuel line connections from the top of the tank. The electrical connection has a slide release, and a push tab. The fuel lines had a couple releases to press in, then get pulled off.
5. Dropped the tank entirely. It's pretty light when empty of fuel, maybe 30 lbs, easily handled by one person, though it's size is awkward
6. Removed tank. Per Vulcan's instructions, remove the fuel pump assembly using a wood block and hammer. Luckily, my lock ring came loose easily
7. Drilled a hole in the tank for the draw straw II using a wood drill kit's 1 1/4" hole saw. We held a coffee can in through the fp hole to catch the drill debris. Worked great.
8. Sized the depth of the draw straw, per instructions. Took it to a grinder to angle the bottom, smooth the edges to ensure any impact with the tank wouldn't puncture it. We left about a 1/4" of clearance. I never run the tank below 1/2 anyway.
9. Installed the draw straw, reinstalled the intank FP so the fuel level gauge will work. Used the supplied cap to cap off the larger fuel line lead - the output, and secured that with wire twist job. A zip tie, or small hose clamp would work too. Took the shorter new hose, pressed the hose onto draw straw and secured with a hose clamp, hook the JIC into the adapter. We used locktite thread sealer (not thread locker) to seal all the threads. Pipe tape would have been an option.
10. Installed the tank, hooked up the stock fuel return line (clips on), hooked up the electrical lead. (clips on)
11. Ran the fuel line along the frame rail, inside of the body mounts. (see pics)
12. My truck had an adapter block when the normal engine mounted pump is located, put there when Dodge did the intank retrofit. I unhooked all of that, and all of the fuel rails from the VP44 to the filter and the filter back. I also unhooked the FP power line, and plugged the supplied Vulcan extension lead. I used the supplied plastic conduit to protect the lead, and ran it back to about the front of the tank. I did this to ensure I had enough lead before I tried to position the new FP
13. I found a good place to mount the pump, where the power line extension would reach, yet the fuel line from the tank would also reach. I installed the (2) JIC adapters to the pump, then mounted the pump, attached the power line, trimmed the fuel line, installed a JIC swivel adapter to the hose, and attached the hose to the IN on the pump. Please note that I used the mounting bracket as a reinforcement plate, NOT as a true mounting bracket. Hence, the picture may look a little confusing to some.
14. I then put a JIC swivel on the end of the longer hose, a JIC adapter on the pump OUT, and attached the hose to the front of the pump.
15. I ran the hose along the rail, and fished it up into the engine compartment, trimmed it to a length appropriate to attach to the fuel filter, attached a JIC swivel, put a JIC adapter in the fuel filter inlet, and attached the hose from the FP to the fuel filter
16. At this point, I hit a problem. It *appeared* that Vulcan didn't supply enough JIC's to finish the job. I had one for a 1/2" ID hose, and one for a 3/8" ID hose. Hmm, doesn't work to run the big hose from the fuel filter to the VP44. So I used the stock metal/rubber hose assembly with banjo bolts. I will get another JIC from them, but it works for now.
I went from 7 psi idle, 3.5 psi WOT to 15 psi idle, and 10 psi WOT!! :peelout
The fuel pump is noisy in the cabin. Probably because I didn't mount it to the frame, I mounted to the cab. I will try some rubber sheet to insulate, but ultimately a Walbro will replace it.
Top of the tank connections:
Looking into FP hole in tank:
Drilling 1 1/4" hole for Draw Straw II:
Cutting the Draw Straw to length:
POS intank pump
Draw Straw II in position:
Reinstalling intank pump (just for the fuel gauge aspect)
Locking in place:
My location for the fuel pump:
Power lead and large hose running along frame rail
I don't have good pics in the engine compartment of the rest of the installation
I dont have a dodge, but that is an excellent write up F4.
could hook up the old pump as an emergency fuel tap.
Yep lots of injector pumps have died due to lost/low inlet line pressure. Without a gauge you will not know that the lift pump has died until you open the system. In many cases this is too late.
Okay, I SCREWED UP
As the campaign pump says right on the bottom, it needs to be mounted vertically.
After trying some rubber washers and they not helping much, I thought about how the intank pump is cooled and quieted by the fuel. I then thought about how the campaign pump wouldn't have much fuel inside it the way it was mounted.
Sure enough, I actually READ the pump and see it needs to be vertical
So, I remounted it, and used double rubber bushings between the bracket and the chassis, now it's quiet.
Nice mod - That will make any future lift pump replacements much easier!
The newer Dodge Cummins engines use the same Bosch high-pressure common rail fuel system as the GMC/Isuzu Duramax engines.
The GMC/Isuzu setup has no lift pump
. It is a vacuum draw from the fuel tank to the fuel pump in the engine. I'm not sure if the newer Dodge setup has a lift pump or not.
I have an '04 Duramax and added a lift pump down near the fuel tank. I chose a setup from Kennedy Diesel - its a ~$200 pump, more if you want the whole kit. Kennedy Lift Pump
One of the great things about this pump is its MBTF is over 40,000 hours, so it should outlast the vehicle several times over.
The pumps can also be ganged together for more flow.