2nd Gen Non-Engine/Transmission Transfer/Lift Pump

[DNewell]

I know that for my year of truck, there are major problems with the LP. Here's my story. I purchased the truck in Nov. 2005. Truck ran great. Put FP gauge in based on advice from a good friend. FP read 0. Yikes I went and purchased new LP from NAPA, Carter LP to the tune of $180. I believe I did this in either late December or January. Well, starting last month, the FP gauge is now bouncing around from 12psi at idle and 8. 5psi at WOT down to as low as 6. 5psi idle with 3psi at WOT. When the psi drops down, if I wood the throttle, it will generally bounce back to the higher numbers and stay there for a while. There's no rhyme or reason why the FP drops really low. I use Diesel Kleen on a bi-refill basis. Would you say my LP is going bad? I'm going to be taking some bigger trips in late July and August, and I don't want to have any problems.



What replacement system would you all recommend? I've done a little research on the F. A. S. S system, but I don't think that I need all the filters and such. Does anyone know if you can just strictly mount their pump and call it good? Are there any other systems out there for a reasonable price that will be more dependable than the stock system?



Does anyone have any experience with the BD Diesel performance pump or the Bully Dog system? I found some through Summit Racing's website for reasonable prices.



I did contact NAPA, and there's a one year warranty on this pump, so maybe I'll get real lucky. However, if I can keep a new one as a backup, I may still buy an aftermarket/hop-up pump.



Your input would be extremely valuable. I appreciate it!

 

[master1578]

Based upon my experience, however limited. I would say your LP is done. Every one of mine (I'm on #5) acted the way yours is acting. You can get just the F. A. S. S. pump. I think there is a 95 gph and a 105 gph version. I'm sure someone will correct me if that's inaccurate. The ease of getting a replacement Carter POS pump has kept me from making a switch. That's about to change though. I'm strongly considering getting a Helix cam and mechanical pump. At the rate I'm eating up Carters it'll pay for itself in no time. You can also check out the Walbro thread at CUMMINS FORUM people seem to be having some success with that as well. I'm sure you'll get a few other suggestions here shortly.



Good Luck,

 

[Fishin Guide]

The entire reason I went to a Helix cam was to get the 12Valve mehanical pump. The other benefits to the cam were like a freebie to me.



I also burned up 5 lift pumps. That has come to an end.



Dave

 

[Bobalos]

sounds to me like your FP transducer is going bad. Mine did the same thing (twice). I would put a mech gauge on it & make sure that its the lift pump & not the gauge.



FWIW, I am using an old Mallory 140 pump back by the tank, & taking it up to the fuel seperator with -6 AN tubing. it looks clean & works well for me. Its been in over a year now & about 60k miles.



bob

 

[BQuinones]

MITUSA is a GREAT option!

I highly recommend going with a MITUSA pump. The system that Opie developed and put together is SUPERB!!!! Installation straightforward and only takes a few hours to do. The Hobbs switch wiring is quick and easy. Opie put a lot of thought into his system, and I am more than impressed. For me, the most difficult aspect of the installation was where to run the lines to connect to the MITUSA. A little more time pre-planning on my behalf would have made that quick, as well. Opie supplied a priming kit with the setup to make things even easier. The MITUSA is well worth your consideration. Check out this thread for more on the MITUSA: https://www.turbodieselregister.com/forums/showthread.php?t=155832&highlight=mitusa



I bought my truck in December and was planning to go with gauges first, but as I thought more about it I decided to get the MITUSA figuring the fuel pressure gauge would tell me my lift pump was going out. If that was to be the case, I would have needed to replace the lift pump anyway. Now, the gauges are next.



Ben

 

[JGheen]

That's crazy that some of you guys have gone through 5 lift pumps. I actually have had great luck with mine and got over 150K out of my original one and last year I just installed a new one in an attempt to get rid of the ticking noise. I still have my original one for a back-up in case the new one goes out but overall, IMHO, they are very reliable units.



DNewell, this may be a stupid question but when was the last time you changed your fuel filter? Have you checked you pre-filter screen on the lift pump? I never had any issues but lots of others have had low fuel pressure issues due to clogged fuel filters or pre-filter.



Joe

 

[Fishin Guide]

That's crazy that some of you guys have gone through 5 lift pumps. I actually have had great luck with mine and got over 150K out of my original one



Joe

What's even crazier is that I lost them all in under 60K. I also, checked the prescreen filters, ect. But, to no avail. The biggest problem on the pickup side is the 3 restricive areas in the stock module. Under 1/4" ID.



Dave

 

[DNewell]

DNewell, this may be a stupid question but when was the last time you changed your fuel filter? Have you checked you pre-filter screen on the lift pump? I never had any issues but lots of others have had low fuel pressure issues due to clogged fuel filters or pre-filter.



Joe

Well, I changed the main fuel filter right before changing the LP. however, and I hate to sound stupid, but I didn't realize there was a pre-filter. I'll check into that. Actually, if the prefilter is a screen, there wasn't one on the truck, if I remember rightly when I replaced the LP. If there was, then I definitely did replace it. The FF would have been replaced about 7-8 months ago, right before the new LP went in.



Also, my gauge is a mechanical one. It has a line that I tapped into the top of the fuel filter cap that goes to a regulator mounted on the firewall. From the other side of the regulator is another braided line that contains antifreeze. No electric gauges for me...

 

[JGheen]

Actually, if the prefilter is a screen, there wasn't one on the truck, if I remember rightly when I replaced the LP.

That could be the reason your failing the pump, your probably sucking some dirt or large particles that would have been otherwise caught by the pre-filter into the pump and trashing your pump. It is basically a pre-filter/fuel heater housing. I removed my fuel heater from the assembly since I definately don't need it out here in sunny, hot So Cal. Maybe someone can post up a pic of the whole assembly. There are pics out there but mine are only in my Service Manual.



Joe

 

[DNewell]

I found another option, it's made by www.glacierdieselpower.com and is called a Walbro pump. It's a gerotor type pump and is reported to do up to 130psi. I'm strongly considering this pump, but has anyone heard anything about it?

 

[Fishin Guide]

Well, I changed the main fuel filter right before changing the LP. however, and I hate to sound stupid, but I didn't realize there was a pre-filter. I'll check into that. Actually, if the prefilter is a screen, there wasn't one on the truck, if I remember rightly when I replaced the LP. If there was, then I definitely did replace it. The FF would have been replaced about 7-8 months ago, right before the new LP went in.



Also, my gauge is a mechanical one. It has a line that I tapped into the top of the fuel filter cap that goes to a regulator mounted on the firewall. From the other side of the regulator is another braided line that contains antifreeze. No electric gauges for me...

I have a prefilter on the bottom of the stock fuel module. It hass been cruded up twice. After next week, it'll not have that issue as I am building a new pickup assy.



Dave

 

[Joe Mc]

I found another option, it's made by www.glacierdieselpower.com and is called a Walbro pump. It's a gerotor type pump and is reported to do up to 130psi. I'm strongly considering this pump, but has anyone heard anything about it?

After 4 LPs in 75k miles I was waiting for something new. I happened to catch a post on the "Products/Accessories - Engine & Transmisson" forum about the Gear Rotor pump. See GFS-392 link in my signature - I'm very happy with the product and especially customer service, Rich (the owner and sole employee) is an excellent fellow and is all about pleasing his customers. He'll work with you to design a specific system for your needs.

 

[kkmckinney]

Get the BD aux. lift pump and be sure to install a fuel pressure gauge. Always carry a spare original lift pump. The truck will continue to run fine when the original pump starts to fail. You will have time to find someone to install the spare pump. This is a safe and inexpensive way to go. I've only had one lift pump to fail after 40,000 miles.

KEN

 

[NoSeeUm]

What's even crazier is that I lost them all in under 60K. I also, checked the prescreen filters, ect. But, to no avail. The biggest problem on the pickup side is the 3 restricive areas in the stock module. Under 1/4" ID.



Dave

How much more fuel were you adding by then Dave?



I am on my 3rd LP, 2nd went out about 30k. No extra fueling during that period.



Jim

 

[Fishin Guide]

How much more fuel were you adding by then Dave?



I am on my 3rd LP, 2nd went out about 30k. No extra fueling during that period.



Jim

The first 2, none. EZ for the 3rd, Sticks, and Comp for the 4th and 5th.



Now, more fuel and more miles than any of the stockers.



I will get the new pickup in this week. Gonna get some help dropping the tank. Fuel supply should no longer be an issue!



Dave

 

[steved]

That could be the reason your failing the pump, your probably sucking some dirt or large particles that would have been otherwise caught by the pre-filter into the pump and trashing your pump. It is basically a pre-filter/fuel heater housing. I removed my fuel heater from the assembly since I definately don't need it out here in sunny, hot So Cal. Maybe someone can post up a pic of the whole assembly. There are pics out there but mine are only in my Service Manual.



Joe

It doesn't matter, you can still pull a lot of crap out of the tank even with the screen in place... i have shown that on several occasions.



IMO, replace the OEM stuff with a reputable aftermarket before the first pump dies as you will do nothing but replace LP after LP... if I would have know that with the 99, I would have bought a FASS the very first time... I had that much $$$ in replacement LPs...



steved