Engine/Transmission (1998.5 - 2002) Results of removing OEM lift pump

[Red360]

Today I removed the factory OEM lift pump and my "pusher pump" setup. I installed a Carter P4601HP where the pusher used to reside, next to fuel tank. I also installed Geno's modified Banjo fittings on the injector pump and outlet of fuel filter, along with a A/M Boost gauge t use as a fuel pressure gauge. I tapped the banjo bolt on the bottom of the fuel canister, so I am reading post filter. The results are great. At idle the pressure reads a rock steady 13PSI. At 70 MPH 12 PSI. With the comp set at 5x5, max acceleration, the pressure reads 10 PSI. Not too bad for one pump. For those who do not there pressure ever to leave 13 PSI, you could run two of these pumps in parallel, for the cost of one factory lift pump. If anyone needs a spare OEM lift pump or pusher pump setup, drop me a PM.

 

[monkfarm]

purchased where?

Where did you get the Carter, and how easy (hard ) was it to install?

 

[Red360]

Easy

You can get the pump from Jegs or Summit.

 

[curatchko]

I posted a question about this a while back and nobody answered. Why keep the OEM pump when using a carter pusher? Why not just the single pusher??



If you don't have any problems with this, I'll probably do the same.

 

[Breck]

Can you use the OEM lift pump as a pusher? I was thinking of moving the OEM lift pump back by the tank and making a wire harness that would reach??



V/R



Breck

 

[Red360]

PSI

The reason you can't use the pusher as the primary pump is that it only supplies 7 PSI. The pusher is the Carter 4600. The 4601HP supplies 14PSI.

 

[Ncostello]

Red360:



Did you just use the wiring leads from the old OEM lift pump to power this new setup. If so, how does this new pump react to the duty cycle volts during key on and start up? Does it do what an OEM unit does to not give full pressure at startup? Curious. Thanks.

 

[Gary - K7GLD]

To each his own - and certainly, different year vehicles have different versions of pumps - but my '02 came off the dealers floor with a LP that easily supplied 16 psi at idle, 15 at cruise, and 12 WOT - all from it's STOCK location...



Of course, many of us have become distrustful of the stock pumps, and choose to add "help" and insurance in the form of pushers - sorta like our spare tires - we HOPE to never need or benefit from them - but it's sure reassuring to HAVE them there just in case!



YEAH, we COULD just use a single. "better" pump (IF we could ever FIND such a beast!) in a "better" location - but the reassuring comfort of that "spare" sure is a comfort out on a dark and rainy night...

 

[Red360]

Pump

Ncostello

I used the factory wiring harnes to power the new pump. What I did was buy an extension harness from Cummins. I think this harness which is 10" long is for the "new" style lift pump. I then lengthened the wiring harness to reach the pump in it's new location. This new harness just plugs into the factory harness. When the key is turned on the gauge reads 13 PSI.

 

[HVAC]

Lift Pumps

I think your on the right track Red360. I've been

running a single pump for 2 1/2 years with great results. I just don't care to retain that stock pump in the system. Especially for high performance applications.

 

[Red360]

Thanks HVAC. So far I'm very impressed!!

 

[Ncostello]

Breck:



I have read of those who use stock OEM lift pumps back by the fuel pump, all by itself. But I have never got a reply from anyone telling me the physical difference between the stock lift pump and any other Carter pusher, whether 7 or 14psi. I assume "pusher" means installed back by the tank and "lift pump" means up by the engine. I know of no difference between the actual pumps themselves... unless someone else chimes in. They all say Carter and they all look the same... only difference is pressures and flow volumes I guess. I think the OEM should work fine back there.

 

[Red360]

You can use the stock lift pump in the back by the tank. The reason that I didn't was two fold. First, the stock lift pump requires metric fittings to adapt it to AN fittings. These adapters are pricey. Secondly is the cost. The stock pump from Cummins runs around 150 bucks. For around 80 bucks, you can buy the same pump but with standard threads. I can buy two aftermarket pumps for the cost of one OEM. This way I'll have a spare. I would bet that Carter does make the OEM pump, just with different fittings. On the outside, these pumps look identical.



Ncostello:

The pusher pump is a low pressure (7PSI) helper pump. The stock OEM and Carter P4601HP supplies 14PSI.

 

[Ncostello]

Makes alot of sense Red360:



Must be some markup there along those lines. Anyway, Hmmmm. Like you mentioned, a dual 14psi setup in parallel would be interesting too. Both should be able to pull through a filter fairly easily, plus if one goes out, the other will handle the job just fine. Bypassing would probably not be needed.



But wiring would probably be more complicated than just jumping wires from one motor to the other. Probably not enough electrical capacity in the OEM wiring circuit to run both. But not too big a deal.



And, now we have doubled the volume, while maintaining 14psi. I wonder if the stock fuel lines will handle the increased flow-around volume to the injector pump and back to the tank.



And I wonder if the noise of two pumps running would sound annoying. Just thinking out loud. I think you may be onto something I like, will surely work, and not to much$$$.

 

[Daddy]

Is this setup still working out for you? When you eliminate the stock pump how did you join the lines? I havent looked that close yet but I thought they had some kind of quick disconnects. My pump is dying I have to do something this week.

 

[Opz01]

Just wanted to share my experiences with the p4601 as a single. I have went through 4 of them so far. The first 4601 lasted the longest (20K). But the reason I feel it did so was that I was only running DD2 injectors. When I went to bigger injectors it seemed tokilled my LP everytime I ran the quartermile. Which led to running a p4600 prepump to the p4601. But this is by no means a cure all either. Even in this configuration I went through a p4601 however in this config the P4601 gave me notice. The fuel pressure dropped to half pressure. When I was only running the p4601 by itself it always left me stranded. Now I always carry a spare of each pump with me...

Opie

 

[Daddy]

I thought that the single 4601 sounded like the ticket, but it sounds like its not that reliable either. A reliable single pump is the answer, just dont know where to get one. I'll probably just get a new one from cummins and cross my fingers, maybe relocate it.

 

[o_mccarroll]

I am waiting to take delivery (hopefully this week!) of a PE4200 pump from Advanced Diesel Technology. I've heard of a few people using this pump with good results. Hopefully I will have the same to report! One pump mounted back by the fuel tank seems so much better to my way of thinking. Keep it simple, stupid is my motto. Simple design, and the pump carries a 2-year warranty. That in and of itself persuaded me to give it a shot.

 

[duaneparks]

Originally posted by o_mccarroll

I am waiting to take delivery (hopefully this week!) of a PE4200 pump from Advanced Diesel Technology.

I'm curious to see how you make out with that PE4200. Are you going to be at the LSTDR Rally this month?



Duane

 

[Mopar-muscle]

carter pump.

yes carter makes the oem lift pump .



i installed the 4601 in the stock location , it lasted 1 year and 40k miles , died when i ran it out of fuel (this was the second time it happened in a year) reinstalled the original back in march and its still running . i'll be installing a new 4601 back at the tank in the near future , and i carry the stock as a spare , i am going to put the stock back in its its stock location and configure the lines and power do its an easy switch from one to the other in case of a failure .



opie , i have been running dd3's for the same amount of time as the pump along with a hot PE and EZ , 412 at the rear wheels , the injectors weren't the reason that pump failed , where was it mounted ?



the pumps are failing mainly because they are mounted in the wrong plcae ... where have i heard this before ???