What would be better, in tank or external lift pump, and what brand would be best for my 05 crd ? External seems like it would be easier and less expensive. I have never installed one before is there a certain pressure that the pump needs to run at?

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2005 jeep liberty CRD GDE Full Torque Eco tune,Blue Samcos,Transgo shiftkit,Provent,V6 Airbox, Facet 40109 fuel pump ,Straight piped . OME lift 235/75/16 Hankook DynaPro ATM tires,weeks101 elbow kit FCV/EGR delete

Lots of discussion on this topic so I'm sure you will get plenty of input. Consensus seems to be:
1. PSI should be on the lower end - say 5-10 although as high as 15 might? be ok, above 15 probably not ok
2. in tank is, of course, best as it pressurizes the entire system (which is the type of sytem the fuel line quick disconnects were designed for). Downside is having to drop the tank for install and the price tends to be a bit higher and IIRC the intank pumps are not flow thru so if they fail you are parked.
3. in line IMHO the best options are Facet 40109 or single Kennedy Duramax lift pump both of which are flow thru so if they fail fuel continues to flow to the CP3 main pump. There may be a decent GM diesel in line pump option also.

There is debate on where to install an inline pump. Back on a "frame" rail near the fuel tank in theory is probably best but there are several installs in the engine bay that seem to work just fine.

I have a Facet to install someday. When I do it will probably be in the engine bay on the line coming from the tank with a clear bowl pre-filter just in case.

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Sold to LOST member my 05 Ltd, GDE Stg II turbo + TCM tune, SunCoast TC w. Transgo kit, Steiger window regulators, Samcos, Fumoto valve, 2nd gen filter head with Lub. Spec. bleeder, Hayden clutch & 11 blade fan, inverted spare, P-1 battery, BF Goodrich Long Trail TAs, Etecno1 glow plugs, timing belt at 50K miles/8 yrs

Thanks for the reply ! There is a $100.00 difference between the Kennedy and Facet is the Kennedy that much better also on the web site it says the Kennedy runs at 4psi is this right or can they be adjusted ? Im gonna go with the external pump i know the intank is better in theory but it is just not worth the cost and trouble for me to do it. I know a few guys who run external lift pumps on there trucks with no problem !

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2005 jeep liberty CRD GDE Full Torque Eco tune,Blue Samcos,Transgo shiftkit,Provent,V6 Airbox, Facet 40109 fuel pump ,Straight piped . OME lift 235/75/16 Hankook DynaPro ATM tires,weeks101 elbow kit FCV/EGR delete

The Kennedy is usually daisy chained if more than 4 psi is needed. Is it better than the Facet, I don't know. I did have bit of trouble, don't know why, finding a Facet locally and wound up buying from http://www.yachtsupplydepot.com/mechani ... t_697.html Figured if the Facet was good enough for marine use it was good enough for my CRD.

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Sold to LOST member my 05 Ltd, GDE Stg II turbo + TCM tune, SunCoast TC w. Transgo kit, Steiger window regulators, Samcos, Fumoto valve, 2nd gen filter head with Lub. Spec. bleeder, Hayden clutch & 11 blade fan, inverted spare, P-1 battery, BF Goodrich Long Trail TAs, Etecno1 glow plugs, timing belt at 50K miles/8 yrs

An in-line pump is what is used for an '05 GMC Sierra 3500 van with the 6.6 Liter Diesel engine:

http://www.rockauto.com/catalog/raframecatalog.php

This link only gets you part of the way. Specify this particular vehicle, go to fuel, then select the fuel lift pump.

Seems to meet most of the criteria you need. Not sure about the flow-through aspect, which is a very good point.

From what I have learned, a fuel pump should push fuel rather than pull it. Therefore, it is better to have the pump as close to the source as possible, hence the (if not one of many) reason why the OEM places fuel pumps in the tank.

FWIW,

Hoosier CRD

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FWIW,
Hoosier CRD

#1 Liberty: '05 CRD Limited Stone White
(SOLD Dec. 2013)
#2 Liberty: ???
"Why guess when you can know?"- Carroll Smith

It's not so much whether a pump should push or pull fuel rather it's the fuel line design that's more of an issue. Back in the old days many if not most vehicles had a cam driven puller pump mounted on the engine block BUT the fuel lines were solid pipe or hose with no fittings all the way back to the tank (dates me but I've worked on enough of these systems). Those pumps worked just fine unless the pump diaphragm died. Some folks, myself included, blocked off the cam hole and replaced the cam driven pump with an electric pump back near the tank but not in it.

More recently vehicles have gone to in tank pumps which still pull fuel into the pump head in the tank and then push it to the engine. I don't know that these are any better although I do know they are harder to replace unless you have a fuel tank access port in the "trunk" (something Jeep deleted along about 04 - thanks DCJ).

The problem with the CRD is that the fuel lines AND the associated quick disconnect fittings were designed to work under pressure from an in tank pump for the gasser KJ. Using a puller pump on the KJ CRD makes those same quick disconnect fittings tend to want to suck in air. Solutions if you have an air in fuel problem include 1) drop tank replace quick disconnects with hose; 2) lightly pressurize the system using an in tank pump; or 3) install a lift pump between the tank and the CP3.

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Sold to LOST member my 05 Ltd, GDE Stg II turbo + TCM tune, SunCoast TC w. Transgo kit, Steiger window regulators, Samcos, Fumoto valve, 2nd gen filter head with Lub. Spec. bleeder, Hayden clutch & 11 blade fan, inverted spare, P-1 battery, BF Goodrich Long Trail TAs, Etecno1 glow plugs, timing belt at 50K miles/8 yrs