2nd Gen Non-Engine/Transmission Mopar factory lift pump tank conversion kit question

[krtcummins]

So I installed the factory lift pump replacement kit that puts the pump in the fuel tank. Now I hear the system is junk. For the folks that have installed the kit on their trucks, what has your experience been? My engine is stock except for a Edge Easy box and 4" exhaust. So far the truck seems to run fine with the new tank pump. Fixed my erratic fuel guage also.

 

[jelag]

I've got 3 trucks we've installed this on... . one of those trucks now has 200K miles on that kit and still runs fine... the other 2 trucks have less than 100K miles on the kit and also run fine... . a pressure test a month ago when we changed our custom fuel filters showed lots of fuel pressure... .

So my 2 bits worth is that these kits are fine... .

 

[krtcummins]

I was hoping that would be the case. I find it hard to believe Chrysler would fix a KNOWN problem with another problem. I'm sure the kit is not capable of handling a modified VP with big injectors and such, but I would hope it would work on a basically stock motor. I paid almost $500. 00 for the kit. In my opinion, I solved two problems at the same time. My erratic fuel guage and the bad lift pump mounted on the side of the block. I hope I'm right. Chrysler should have made this kit a recall item, not make the customer buy it them selves! $700. 00 for a FASS system was a bit much for me to shell out to fix Chrysler's poor design!

 

[Tractorat]

I had the in tank pump installed a few years ago. I was concerned about fuel pressure. So, I had the low fuel pressure LED waring light installed. My local mechanic told me that I could light up the LED (low pressure warning) if I yomped on it. So, I yomped on it and lit the LED. I had a secondary pump installed inline with the intank pump. Now I have great fuel pressure and no problem

 

[krtcummins]

Interesting. What pump did you use?

 

[HHhuntitall]

I've installed several of these kits on both 2nd and 3rd gens, and they seem to work fine as long as you don't try to ask too much of them. A stock truck should see no problems whatsoever, and a few people have Edge EZs on their 3rd gens, and have had no problems. During the shake down run on one I put a guage on, I could pull fuel pressure down to 5psi. I think they'll be fine if you don't try to program them up to 400hp.



On a second note, I've used Holley Black fuel pumps (140gph) on several units, and on a pretty hot ride, I've seen the boost over 40psi, the EGTs up around 1k, and the fuel pressure only drops to around 11psi, using a Carquest fuel filter housing and Fuel/water separator. There are lots of good aftermarket pumps out there. Carter even makes a High Performance replacement for the factory pump on the side of the motor that pump 100gph. But, it's a proven fact a fuel pump makes a better pusher than a puller, so moving the pump to the rear next to or in the fuel tank is always better. Of course, it's always hard to beat a mechanical.....

 

[mhenon]

My intank pump would hardly put out 7psi. As we were towing heavy it would drop tp almost "zero" pressure at times. Not good!

After adding a second LP to the frame and Vulcans big line kit pressure went to 26psi. That was a little too much so I installed Glacier's bypass valve after the LP and regulated pressure to ~15psi. Now it won't drop past 12psi no matter how you get on it.

Been this way for 5 years or so. Still have two spare Carter's and spare intank if something breaks. Fuel to the VP44 is now down on my list of things to worry about.

Mike

 

[krtcummins]

My intank pump would hardly put out 7psi. As we were towing heavy it would drop tp almost "zero" pressure at times. Not good!

After adding a second LP to the frame and Vulcans big line kit pressure went to 26psi. That was a little too much so I installed Glacier's bypass valve after the LP and regulated pressure to ~15psi. Now it won't drop past 12psi not matter how you get on it.

Been this way for 5 years or so. Still have two spare Carter's and spare intank if something breaks. Fuel to the VP44 is now down on my list of things to worry about.

Mike

When you say your "In-tank pump" what brand pump are you talking about? How long in service. How many miles, Etc.

 

[mhenon]

The intank pump installed by Dodge under warrenty. Any time you had a VP44 failure on a 24v engine ('98-'02) the dealer would pull your Carter LP (engine mount) and install an intank pump. As I said in my previous post the intank pumps never developed much pressure. If they could maintain 7-9psi, which some did, you were probably OK. Mine maxed out at 7psi at idle and would drop close to zero with a load.

My opinion is that intank pumps in general are pretty reliable. You rarely hear of a lot of problems and most modern vehicles probably come stock with some type of intank pump. It's just that the one Dodge used couldn't keep up with the demands of the Cummins engine. It does make a great little pusher pump to supply a second lift pump which is what I use.

As for service and miles I'm going on five years and 60K miles on my present setup.

Mike

 

[krtcummins]

The dealer replaced my VP44 under the emission warranty at 57,000 miles. They replaced the lift pump on the side of the block also, but did not install the in tank pump. Did I get the shaft again? I purchased and installed the in tank kit myself last year.

 

[dclassens]

I have a large work truck that is heavy and I had a personal H. O. Cummins with this set up. Many Many miles with no problems. I have heard form others that this setup puts out a larger volume and that is what makes this kit work good for STOCK level trucks. Also the LED and gauges work on press so added volume is not monitored by the warning systems.

 

[MCopenhaver]

I also have a 2002 with dealer installed in tank pump. Bought truck used and came this way and just put gauges on it. Like mhennon mentioned only seeing about 5 psi at best and drops to less than 2 whenever on throttle. This concerns me since everywhere I look indicates I should be seeing better than 10 and around 15 at idle for stock lift pump. Anyone know what I should be seeing? Can this be normal for this arrangement???

 

[mhenon]

Your VP won't last with that kind of pressure. It is normal to see low pressure with the intank pump alone so you need to do something before you have a breakdown.

There are a lot of choices out there. Check with Vulcan or Glacier Diesel and they can help get your pressure back up. Both guys (Eric & Richard) are great to deal with and know their stuff. Give them a call.

Mike