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6.4L Power Stroke Diesel Engine fitted to 2008 - 2010 F250, F350 and F450 pickup trucks and F350 + Cab Chassis

2008 HPFP Ups and Downs

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Old Feb 9, 2011 | 03:00 PM
  #16  
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Originally Posted by powerskull
Would a system like the FASS help out at all. i have hard on other sites about lift pumps. what can you add to help in extending or protecting the fuel system namely the HPFP?
I'm not sure how much something like that would help. I don't think it would hurt, however I do think it would be a possible target if Ford was looking to deny a warranty claim, so you have to take that into consideration.

What I think would help, and would be relatively inexpensive is to install a pressure gauge in the fuel line past the HFCM with a display in the cab. The pressure should be low enough to use an ordinary oil pressure sender and gauge pair.

By noting the normal fuel charge pressure heading to the engine HPFP you should be able to identify if the pressure is dropping due to HFCM filter clogging, air or the like and hopefully head off any problems.
 
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Old Feb 9, 2011 | 05:48 PM
  #17  
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Originally Posted by wp6529
I'm not sure how much something like that would help. I don't think it would hurt, however I do think it would be a possible target if Ford was looking to deny a warranty claim, so you have to take that into consideration.

What I think would help, and would be relatively inexpensive is to install a pressure gauge in the fuel line past the HFCM with a display in the cab. The pressure should be low enough to use an ordinary oil pressure sender and gauge pair.

By noting the normal fuel charge pressure heading to the engine HPFP you should be able to identify if the pressure is dropping due to HFCM filter clogging, air or the like and hopefully head off any problems.
I asked the Ford mechanics point blank (while mine was down for the pump) if using a FASS or Air Dog would affect my warrantee.
They said "yes, just use an additive".
I know there is some question about it. Just saying what they told me.
The common sense part of my brain tells me if you can't get consistent quality fuel then you do what you have to.
If you live where I do and it's readily available then use it ( pay for it ).
 
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Old Feb 9, 2011 | 08:11 PM
  #18  
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Originally Posted by wp6529
What I think would help, and would be relatively inexpensive is to install a pressure gauge in the fuel line past the HFCM with a display in the cab. The pressure should be low enough to use an ordinary oil pressure sender and gauge pair.
Good thought, but I don't think it would work well. These fuel systems operate at a much lower pressure than expected for an oil pressure sending unit. Only 3 PSI!



I don't now what could accurately determine pressure within that range.
 
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Old Feb 10, 2011 | 12:24 PM
  #19  
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There are certainly pressure sensors that will accurately measure low pressures, but I guess 3 PSI rules out stuff you can find cheap at your local auto parts store.
 
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