HPFP Failure!! - Page 3 - Ford Powerstroke Diesel Forum
General 6.7 Discussion (2011-2016) General 6.7 Discussion

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post #21 of 42 Old 10-29-2019, 05:47 PM
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Showing the internals in depiction as to how it operates:



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post #22 of 42 Old 10-29-2019, 05:58 PM
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Just to show the "problem" that happens upon lack of proper lubrication.






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post #23 of 42 Old 10-29-2019, 07:21 PM
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50k psi or 29.9" Hg, the engineering problem is delta pressure. Not operating pressure.
There are commercially available filters designed to operate at 30k psi down to 0.5 micron at 3gpm. Not for fuel necessarily, but still.
Anyway, I'm just a geek for the engineering aspect of it. I'm sure Ford and others have better geeks than me. Just don't get it other than the almighty $$ part of it.
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post #24 of 42 Old 10-30-2019, 02:45 AM
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Those are the aspects that I would love to learn about how things are designed.
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post #25 of 42 Old 10-30-2019, 04:32 PM
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bio diesel typically has a higher lubricity rating than ulsd. the catch is that it produces more soot than ulsd. I have decided to treat the lubricity issue and use mostly ulsd. When running on bio I still use an additive.
To the OP @aboyles give us some follow up. Your experience with this issue will be valuable to others. The situation sucks but still the forum is about issues and solutions. Your input will be appreciated.

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post #26 of 42 Old 10-30-2019, 06:28 PM
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I have a 2011 6.7 with 110,000 miles on it. 30,000 on a new fuel pump. I replaced it because I broke off a fitting draining the fuel tank after contaminated fuel (the contaminated fuel never went through the pump or engine, I caught it before running the motor).

Your posts have me worried. I have never knew of this issue and have recently had a new, louder noise of the truck's fuel pump (after the truck turns off) that is louder and more growly or varied pitch grown.

Do you guys think this might be a fuel pump? They are easy to change. If I do change it, just buy another 2011 or does the new 2016 just bolt on without mods.

I have never used fuel lubricant only some additives when the winter fuel gels up.
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post #27 of 42 Old 10-30-2019, 08:17 PM
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Quote:
Originally Posted by TPOPPY View Post
I have a 2011 6.7 with 110,000 miles on it. 30,000 on a new fuel pump. I replaced it because I broke off a fitting draining the fuel tank after contaminated fuel (the contaminated fuel never went through the pump or engine, I caught it before running the motor).

Your posts have me worried. I have never knew of this issue and have recently had a new, louder noise of the truck's fuel pump (after the truck turns off) that is louder and more growly or varied pitch grown.

Do you guys think this might be a fuel pump? They are easy to change. If I do change it, just buy another 2011 or does the new 2016 just bolt on without mods.

I have never used fuel lubricant only some additives when the winter fuel gels up.
You should definitely use a fuel additive that increases lubricity at all times. The additional cost is negligible. As for the need to replace the fuel pump , its hard to say without hearing it.

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post #28 of 42 Old 10-31-2019, 02:49 AM
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Quote:
Originally Posted by TPOPPY View Post
I have a 2011 6.7 with 110,000 miles on it. 30,000 on a new fuel pump. I replaced it because I broke off a fitting draining the fuel tank after contaminated fuel (the contaminated fuel never went through the pump or engine, I caught it before running the motor).



Your posts have me worried. I have never knew of this issue and have recently had a new, louder noise of the truck's fuel pump (after the truck turns off) that is louder and more growly or varied pitch grown.



Do you guys think this might be a fuel pump? They are easy to change. If I do change it, just buy another 2011 or does the new 2016 just bolt on without mods.



I have never used fuel lubricant only some additives when the winter fuel gels up.
The main sign is metal flakes in the fuel filter housing when you change your fuel filters. If you see metal in there, nine times out of ten, it's already too late

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post #29 of 42 Old 10-31-2019, 03:24 AM
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Quote:
I have never knew of this issue and have recently had a new, louder noise of the truck's fuel pump (after the truck turns off) that is louder and more growly or varied pitch grown.

That is not the fuel pump. It's been said that kind of noise is the 2011-14 wastegate on the turbo.

Noise from the lower fuel pump (HFCM) before starting the motor is generally associated with poor sealing allowing air into the system. Such happens after fuel filter changes when the o-ring isn't seated correctly.



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post #30 of 42 Old 10-31-2019, 08:04 AM
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Quote:
Originally Posted by HeavyAssault View Post
That is not the fuel pump. It's been said that kind of noise is the 2011-14 wastegate on the turbo.

Noise from the lower fuel pump (HFCM) before starting the motor is generally associated with poor sealing allowing air into the system. Such happens after fuel filter changes when the o-ring isn't seated correctly.
My 15 has always had (since I bought it 3 years ago) a loud whinny DFCM and I have always bottomed the seal on the housing myself so I don't have to worry about it not sealing correctly to the filter housing and the housing itself bottoms out when installing it so it should have a good seal.

As for fuel lubricity this ULSD sucks. For the last 6+ years I have tried to buy my fuel at the same mid-west name brand store or sister store and have always added the correct power service for the season.

This week I ran across an old Diesel Fuel Lubricity Test done back in 2007 checking the wear of diesel with additives. This has been attached. I am not sure if I am reading this correctly or not but I do believe the #1 result is the 2% bio-diesel blend? A 5%-20% blend is mandatory here since I live in the corn state, it's 99% all bio/ethanol blend here which I hate but that's a different topic. Otherwise it looks like I need to switch to the Opti-Lube. I see Opti-Lube has had tests done with the XPD and their XL. Looks like the XL performs even better than the XPD.

What you you guys get from the test attached?

Also Ford states the micron level for the fuel filters is 10 & 4 respectively.
Attached Files
File Type: pdf Diesel_fuel_additive_test_2007.pdf (130.7 KB, 31 views)
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Last edited by james2488; 10-31-2019 at 08:12 AM.
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