In-line fuel pump

Oldranger · **Joined:** Tue Feb 11, 2020 8:41 pm **Posts:** 29

Will a 1.5 to 4 psi in-line pump work or do I need a 4 -7 psi? This will be mounted under the hood if that matters.

flash7210 · **Posted:** Mon Mar 02, 2020 7:06 pm

Facet 40109

I’ve been using one for almost 10 years

ebbnflow · **Posted:** Mon Mar 02, 2020 8:14 pm

flash7210 wrote:

Facet 40109

I’ve been using one for almost 10 years

Me too!

iakj11 · **Posted:** Mon Mar 02, 2020 9:21 pm

The facet 40109 is 4-7 psi. A lower psi pump would surely be better than nothing though. If you have or want to have a secondary filter setup, I'm not sure if less than 4 psi would be sufficient.

Oldranger · **Joined:** Tue Feb 11, 2020 8:41 pm **Posts:** 29

Ok I was checking because I can buy either, thanks

WWDiesel · **Posted:** Mon Mar 02, 2020 10:51 pm

iakj11 wrote:

The facet 40109 is 4-7 psi. A lower psi pump would surely be better than nothing though. If you have or want to have a secondary filter setup, I'm not sure if less than 4 psi would be sufficient.

The intank pump provides around 10-12 pisg through both filters to the outlet of the 2 micron secondary fuel filter and to the back of the CP3 injection pump.

Rrusse11 · **Posted:** Mon Mar 02, 2020 11:09 pm

My "new-to-me" "05 CRD came with a "Mr Gasket" inline pump mounted underneath on a small bracket attached to the main rail. While undergoing a computer flash/tune, it started to make some noise. When I pulled off from the tuner, I ran out of fuel and the Jeep died, luckily a 100yds from the shop. Investigation, checking leads for power, and a rap with a hammer, and it started up and got me 30 miles home. Still running just fine after a couple days. I'm guessing here it sucked a bit of air sitting on for a half hour or so.

I've now got in hand a spare;

https://www.ebay.com/itm/12V-Inline-Mic ... 2749.l2649

Chinese, but looks identical to the unit installed. It does come with a prefilter.

It had been wired to the fuel filter assembly, further research has revealed that there is a hot wire under the rear seat that is supposed to feed the in tank OEM style pump. This wire apparently cuts off power after 15-20 seconds after key on if the motor isn't running. A feature that might have prevented my hiccough after tunning. If the current unit fails, I'll tap into that as a power feed. Being below the tank I feel that there should be less stress on any pump.

I feel comfortable with a simple fix to the potential problem of the CP3 pump not generating enough suction. The alternative in tank pump and associated wiring is a LOT more money. The Facet looks to be a better unit
than what I've got.

My $.02.

Oldranger · **Joined:** Tue Feb 11, 2020 8:41 pm **Posts:** 29

I’m thinking about a Holley brand 4-7 psi advance auto sells for $49.99.

WWDiesel · **Posted:** Mon Mar 02, 2020 11:35 pm

The beauty of installing the intank fuel pump is, it sets inside the fuel tank and takes its suction directly from the bottom of the inside of the fuel tank.
So as long as there is fuel in the tank, there is always positive pressure on ALL the fuel lines from inside the tank all the way to the back of the CP3 injection pump.
This puts the entire fuel system under pressure so any leak will be self evident very quickly as identified by a fuel leak.
The problem with mounting an inline fuel pump is if there is a leak on the suction side of the pump or if a leak ever develops, the pump will suck air and cause air ingestion in the fuel going to the injection pump which is very bad on the CP3 pump and even much worse on the injectors.
Not my :2cents:

worth, just simple known facts....it has happened and been reported more than once on this forum. :wink:

TKB4 · **Posted:** Tue Mar 03, 2020 5:54 pm

No doubt an in tank pump has benefits not the least of which is doing away with the dysfunctional connectors . Other than that now I would use the Facet one either in engine compartment or mounted on frame anear transmission support where there is a slot to access nuts to tighten easily.
I have used several small electric fuel pumps on mostly 20hp and above Kohler engines whose fuel pump is external and expensive and doesn't last particularly well the facet is the best but on those some of the $10 ones on eBay work ok. The one Mr Gasket I used only lasted 2 years or so and it was local and needed quick. All the others have lasted more than 4 years now (all were about 4 psi). Now on my two mud motors for boats I dont even have a hand pump in line. I also have spares and tools that can change out in about 15 minutes or less.

Oldranger · **Joined:** Tue Feb 11, 2020 8:41 pm **Posts:** 29

Just installed the Holley from advance Auto Parts, seems to be working good.

TKB4 · **Posted:** Fri Mar 06, 2020 10:46 pm

Glad its working hope it stays that way a long time !! :BANANA:

Rrusse11 · **Posted:** Mon Mar 09, 2020 8:42 pm

After another incident of power loss, I installed the inline pump referenced in my above post. The "Mr Gasket" I replaced with an identical pump, just rebranded. Pinch off the fuel lines, crimped into the hot wire and cleaned up under the ground for good contact. Was about 4yrs old according to the PO.

New fuel filter filled with Diesel Purge, thanks for the tip I found here on the forums about simply removing the fuel head off the firewall bracket. Tooled around for an hour or so at various throttle settings. Even a burst of WOT, (wide open throttle), the old girl got up and went! No hesitation, lots of fuel, no problems. I will get some better screw clamps, the originals are a bit tired. No leaks!

In-line fuel pump

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