Should the Fuel / Lift Pump be in the Tank?

[ctd4stan]

Based on the dealer service records from the previous owner, I did not see a fuel pump replacement (but I'll check and see if its still behind the fuel filter). It seems that some are lucky and still running with the original stock pump and others had to replace it. I plan on taking the safe route and replacing it.



On a variety of threads, folks had the dealer install the pump in the tank, other's are using an Air Dog / FASS / etc. , or some prefer to keep the location of the stock pump where it is and use an aftermarket or replacement stock pump. If I decide on an Air Dog / FASS / etc. , there are other threads that address which one to choose.



The question is for those of you who replaced the original stock pump and (a) put the pump in the tank, or (b) replaced the original stock pump with another stock pump or aftermarket pump, did you have to replace it again?



Maybe your response can include what option you chose and how many miles you have on it so far.

Thanks.

 

[MA2LA]

i would go with a walbro from glacier put on the frame and be done with it.

 

[BDuffy]

your pump,if not changed by dealer should be on the back of the fuel filter . you can go with a replacement from Geno's or go with many of the aftermarkets. I went with the Walbo 392 which is a good product that gives me easy access in case of replacement.

 

[GaryOwen]

I replaced my original lift pump as a preventative measure. I decided to go with the Glacier Diesel Walbro pump. Easy installation with all hardware included in kit.



I had the Walbro pump fail after 42k miles. I had bought a spare pump and was able to replace it on the side of the road. Sent the failed pump back to Glacier and Richard determined the pump motor had a worn out brush - the other brush looked new. He sent me a replacement pump under warranty.



I now have 140k miles on the Walbro pump I replaced and have the spare under the back seat. The Walbro pump supplies plenty of fuel and holds my fuel pressure at a steady 20 psi. I have been happy with the setup and would probably go the same route again.



However, the shop where I get most of my maintenance done has replaced a large number of pumps with the in-tank pump and have not had a single failure. I think the flow rate with the in-tank pump may be a little lacking if you have significant performance upgrades though. Major problem with the in-tank replacement is the cost and difficulty of pump replacement in case of failure (however rare they may be).



Good luck in your decision.



Gary

 

[Buffalo]

I, also, went with the Glacier Diesel GFS-392 (Walbro pump) at about 60,000 miles. Did it as "preventive maintainance". At the time, I found a replacement (spare Walbro) on Ebay for just over $100. 00, delivered. You have to be carefull of cheap imitations, though, & I don't remember what to look for. Some of the folks that sell them have announcements about the imitations.



I, also, keep the spare "ready to go" under the backseat.



Joe F. (Buffalo)

 

[BGlidewell]

pulling the tank is non-trivial, but it CAN be done I would NOT want to do it on the side of a road in a muddy ditch with -20degree windchill

 

[ctd4stan]

All, I have not decided what option I'll pursue, but thanks for the input.

 

[klenger]

I'm still using the original pump.

 

[firemansdiesel]

I replaced mine w/ a Raptor 100.

 

[WKellam]

In-Tank Ma Mopar pump

I had the filter mounted pump replaced with the Ma Mopar In-tank unit last year. I was concerned at first because the original pump showed only 3-4 psi with and 5 psi after the replacement. Being a Master Cert mechanic for Dodge/Cummins, I felt this to be low, in comparison to previous CTD's I have worked with/on. Anyone agree with me that the lift pump pressure should be higher? I no longer work for a dealer, as I have changed careers into Construction and have lost all my inside contacts and abilities to check TSB's and diagnostic data. I do have some air in the line between the isolator and guage, which I need to purge, but the pressure is steady and responsive. which drops to about 3 psi under WOT, but recovers to around 4-4. 5. Any suggestions?

 

[CToney]

Going with a filter/pump system is the route that I have taken. Better filters with fewer filter changes. Better fuel economy and power with air removed from fuel. No smoke and mirrors. We have 4 fass systems and no trouble yet.

 

[Southbound]

ctd4stan-



It is my understanding that after 04. 5 all trucks shipped with the lift-pump in the tank. On previous models the dealership is suppose to do a bench pressure test before installing the replacement pump... ... which now goes in the tank.



WKellam-

I am currently showing between 5 to 10 psi on my gauge but most of the time its closer to 9. One of the biggest factors to pressure readings is the stock fuel filter. Apparently most of the new filters are now rated at 7 micron vs. 10 ( I think) regardless the filters are a little bigger which restricts fuel pressure to the gauge sensor (top of fuel filter cap). When replacing my stock fuel filter I will cut a small piece of plastic from the side to let more fuel get to my sensor. I am assuming that you are using the electric fuel sending unit that Genos carries. Depending on where you reading your fuel pressure the new filters will have a factor in your readings... ... ... ... it certainly did on mine!!!



My . 02

Southbound

 

[DerekW]

pulling the tank is non-trivial, but it CAN be done I would NOT want to do it on the side of a road in a muddy ditch with -20degree windchill

yea but it can be done in a gravel parking lot no jack to lift truck or drop tank if your a bigger boy and tank is close to empty. been there need not go into the story/arguement. whats wind chill at this time of the year?







and to the thread starter if your gf/wife/both if applicable ride in the truck they may not appreciate the noise of a framerail mounted pump even with rubber insolaters. I fixed that problem by installing straight pipe 5" turbo to 7" stacks. you may wish to consider exhaust mods for your occupants. this took care of most our "whats that a winch" jokes.



preferably if this truck didnt have a FASS pump on it when i bought it for the girlfriend i would have installed a Glacier diesel fuel pump on the crank as she doesnt like the noise. you may want to look into this pump. GDP makes has some great products with good customer service.

 

[MA2LA]

I like the Glacier setup but when you look at the cost of adding the filer set up and such its almost 200 more than the airdog, thats where i've been having a personal debate on what way to go.

 

[AABEN]

I am still running the pump that came on the truck!! Bough one from GENO'S!! It is under the back seat. I hope I do not need it. ---BEN