- buy premium diesel fuel and nix the additives.
2008 HPFP Ups and Downs
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Postmaster
Joined: Oct 2010
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From: Northern and Southern Cal
2008 HPFP Ups and Downs
How about a thread on the Ford/Int. high pressure fuel pump on these engines.
There seems to be a lot of info/misinfo out there on these pumps that SEEM to be a bit delicate.
My thirst for info on these deals came about when mine failed at 38k.
I admittedly know little about them as I have only seen mine apart at a dealer and talked to the mechanics about them.
I am a Fordoholic and just want info.
I change my filters every 10k and oil every 4 to 5k.
Also use an additive 4 out of 5 tanks of fuel.
Are they indeed delicate?
Can they be made more solid if so?
Thanks in advance for the info.
There seems to be a lot of info/misinfo out there on these pumps that SEEM to be a bit delicate.
My thirst for info on these deals came about when mine failed at 38k.
I admittedly know little about them as I have only seen mine apart at a dealer and talked to the mechanics about them.
I am a Fordoholic and just want info.
I change my filters every 10k and oil every 4 to 5k.
Also use an additive 4 out of 5 tanks of fuel.
Are they indeed delicate?
Can they be made more solid if so?
Thanks in advance for the info.
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From: Frederick, MD
I think the issue really is they dont tolerate water or bio-fuel well. I think this is because of the way they maintain there lubricity.
couple that with the close tolerances and there is no margin of error.
couple that with the close tolerances and there is no margin of error.
More Turbo
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The HPFP operates up to 26,000 PSI pumping fluid with mediocre lubricity (ULSD), this is no easy feat. Anything the reduces the already poor lubricity such as bad fuel, water getting to the HPFP, air getting to the HPFP or the like has a high probability of damaging the pump.
Given the high stresses the pump sees in normal operation, once it's damaged the damage will just snowball to rapid failure. It's critical to maintain the filters meticulously using only the revised FD4617 filters which reduce the risk of water getting past the HFCM filter and always use a fuel additive that will add some lubricity to the ULSD.
Given the high stresses the pump sees in normal operation, once it's damaged the damage will just snowball to rapid failure. It's critical to maintain the filters meticulously using only the revised FD4617 filters which reduce the risk of water getting past the HFCM filter and always use a fuel additive that will add some lubricity to the ULSD.
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Postmaster
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From: Northern and Southern Cal
But why nix the additives? Isn't helping the cetane level and lubricity helpful?
More Turbo
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The Bosch piezo fuel injectors are reported to not be very tolerant of bio-diesel, and if you have engine problems and Ford finds more than 5% biodiesel in your tank they can deny a warranty claim.
The additives such as the Ford branded additives and the Stanadyne Performance Formula additive (Stanadyne is reported to OEM the Ford additive) increase lubricite without the risks of bio-diesel. The proper additives are also known to notably increase the intervals between DPF regens which is also a significant benefit.
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From: Washington,KS/Lincoln,NE
I did a study for my dealer early on in my days with the 6.4. He had me run Motorcraft Cetane boost through 5 tanks of fuel and record my findings on fuel economy, etc. The results, using Cenex Roadmaster XL premium fuel - no noticeable difference in mileage or performance.
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From: Isanti, MN
Originally Posted by Diesel Power Magazine
The 6.4L Power Stroke eliminated the HEUI system and went to a Siemens common-rail piezo injector that used no engine oil
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Postmaster
Joined: Oct 2010
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From: Northern and Southern Cal
A true premium diesel has all the lubricity and Cetane number that it needs.
I did a study for my dealer early on in my days with the 6.4. He had me run Motorcraft Cetane boost through 5 tanks of fuel and record my findings on fuel economy, etc. The results, using Cenex Roadmaster XL premium fuel - no noticeable difference in mileage or performance.
I did a study for my dealer early on in my days with the 6.4. He had me run Motorcraft Cetane boost through 5 tanks of fuel and record my findings on fuel economy, etc. The results, using Cenex Roadmaster XL premium fuel - no noticeable difference in mileage or performance.
I would have thought it would show up more in my mileage calcs but only found a less than 10% increase.
I'm still happy to reduce the regens as much as possible. It can't be good at all for the health ( longevity ) of the engine to be subjected to that heat.
Hey Crazy
Is there a diagram ( maybe an exploded view ) of any sort for the HPFP?
I've done a quick search and found nothing.
Thanks again guys for the info
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From: Isanti, MN
You can find this in the tech folder under the "6.4L Bible" link. This particular one came from the "Air Management System" link within that page.
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Postmaster
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From: Northern and Southern Cal
Now it's making sense about lubricity, cavitation, lubrication and the like making a big difference in how it runs.
It's a complicated little piece of hardware.
Thanks guys, the visuals help a lot.
It's a complicated little piece of hardware.
Thanks guys, the visuals help a lot.
More Turbo
Joined: Jan 2011
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Complicated and operating at very high pressures. Common hydraulic pumps run at 2,500-3,000 PSI, even the big machines run 4,500-5,000 PSI. The HPFP in our trucks has a lot more in common with the pumps in waterjet cutters.
