Fuel Pump / Replace just Pump or Entire HFCM

[knightgang]

I am having fuel issues in my 2003 Excursion. All symptoms indicate a weak fuel pump. Power is intermittent, comes and goes hot or cold. My question is, "Is there a reason one would replace the entire HFCM assembly vs just replacing the internal Fuel Pump or is there any difference.

I understood that the HFCM housing was basically just a container to house the Fuel pump and filter and allow connection points for the fuel lines with the additional sensor for detecting water in the fuel. Otherwise, there is not any electrical components in the HFCM housing that affect the operation of the actual fuel pump or dictate the pressure that the fuel pump produces.

I need to get my parts ordered today so that they will be here before the weekend. Until then, the truck is parked as to not risk injector damage or being stranded, so quick feedback is appreciated.

[MC5C]

The first thing you should do is measure your fuel pressure and upgrade the pressure relief spring to the latest version (also known as the "blue" spring). The Ford dealer should have a special bypass fuel pressure tester that bypasses the same amount of fuel as used at full power back to the fuel tank, and is the only way to properly test the fuel pump and pressure regulator. You want to see around 60 psi at idle, and at least 55 psi at full power. If you haven't done those two things, then you are just guessing as to the health of the HFCM. On an '03, I would personally change the HFCM to the latest spec. version, it's old enough.

Brian

[knightgang]

Brian, I was not asking your opinion as to if my pump is weak, I know that it is. BTW, the fuel pressure spring has been upgraded as well. I am asking for reasons to replace the HFCM housing as well as the pump vs replacing just the pump. Unless I am missing something, there is nothing mechanical in the HFCM housing itself. There is a Water sensor in the HFCM, but nothing that actually drived the fuel pump and no electrical component that can cause the fuel pump to fail in the HFCM.

Why does it need to be replaced?

[Paul H]

If you purchase the entire unit, it is the New pump, Housing with drain plug and new filter in one box. The new one no longer has a fuel heater.

Nothing to take appart or worry about orings just unbolt the old and bolt on the new and connect fuel lines and wire harness

[knightgang]

Hey Paul. We have talked before. Been a while. Still curious, other than maybe a simpler R&R procedure, what is the advantage or necessity of replacing the HFCM hosing. Seems to me that if there is a mechanical benefit and it costs more, then just replacing the inner pump would be the way to go.

[dannyboy950]

I don't know about where your at but down here they will not sell you just the pump.

[FMTRVT]

It's actually easier to replace the pump rather then the entire unit. Three bolts, one connector and one O-Ring.

From the original supplier of the HFCM:

http://www.parker.com/literature/Rac...mp_Kits%29.pdf


http://www.partsgeek.com/gbproducts/...FQyk4Aod4R4AVQ


http://www.ebay.com/itm/Racor-Fuel-T...item35c1a65698

RockAuto:

AIRTEX Part # E2340 Electric Fuel Pump
Frame Mounted Pump Only
$158.79

Or any Parker supplier

.

[bismic]

Nice post Jack!

Another part number for this pump is HFP964 (Delphi).

http://oregonfuelinjection.com/index.php?pid=12

http://www.finditparts.com/t/4236/ma.../delphi-hfp964

[FMTRVT]

Thanks Mark. While I haven't been around much, Jersey Shore what it is, I try to help where I can.

I think if someone wants to spend the money for one of each that the Airtex/Wells pump is a private labeled Racor unit as typically done in the aftermarket with specialty items rather then a China knockoff. I could be wrong but we won't know until they are compared hand in hand. Or someone call Airtex and ask if it's made in the USA.

[knightgang]

I still have not heard any reasoning for replacing the HFCM housing. Anyway got anything else???

[bismic]

The WIF sensors also go bad if you have a lot of water in your fuel and you don't drain it out of the plug routinely.

[FMTRVT]

Sensor 6C3Z-9C264-A ~$23

If you have a lot of crud in there, HFCM O-Ring 3C3Z-9A343-A ~$12 because when you remove the O-Ring it swells. If you can leave it in the sun for some time it shrinks back down once the diesel dries out.

By this point you are removing the fuel lines so it's almost as much work as replacing the entire HFCM.

[dannyboy950]

Originally Posted by knightgang

I still have not heard any reasoning for replacing the HFCM housing. Anyway got anything else???

$$$$$$$ Everyone is side stepping. If you are ordering from Ford $600 + - as opposed to $158.00 at least the dealers around here. No other reason.

I mean you can get just about any part aftermarket.

[knightgang]

Racor Fuel Pump ordered yesterday. Hope it arrives by Friday. Not changing the HFCM as I see no need to, just the internal pump.