Hi/low injector control press. issue resolved without replacing hpop. - Ford Powerstroke Diesel Forum
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post #1 of 9 Old 03-24-2011, 09:07 PM Thread Starter
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Hi/low injector control press. issue resolved without replacing hpop.

Very big thanks to powerstrokehelp.com videos. I did the hpop oil change as seen in the fuel injector maint. video.
POWERSTROKEHELP.COM - The Information Source for Ford Power Stroke Diesel Owners
I used a $10 hand pump from O'reily's and sucked the thickest, nastiest looking oil out from the hpop sump. I did this proceedure twice, and now when I run my race tune, I no longer get the low injector control pressure dtc (check engine code). This saved me a chunk of dough because I was ready to buy a new pump thinking it's not keeping up. Hopefully this helps someone else also

'02 7.3 Excursion
2007 Harley Wheels with 275/65/20 Goodyear Duratracs and Fred Goeske 2" adapters
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post #2 of 9 Old 03-25-2011, 08:16 AM
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Hmmmmm....maybe I need to do the same thing. That is the round thing behind the HPOP?


That is an excellent link. I watched it all and in the process, answered my question.

12/98 E-99 CC Long Box 4WD Dually Lariat, Banks IC/Wastegate/6-Gun........Heated/Cooled Cupholders

Last edited by Degnol; 03-25-2011 at 08:43 AM.
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post #3 of 9 Old 03-25-2011, 10:36 AM
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Oil in the HPOP sump is constantly being replaced by the LOP as the HPOP draws from it to supply the Inj's..dumb-dumb dumb...
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post #4 of 9 Old 03-25-2011, 01:27 PM
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Well, it couldn't hurt to replace the oil if it is all sludgy, huh?

12/98 E-99 CC Long Box 4WD Dually Lariat, Banks IC/Wastegate/6-Gun........Heated/Cooled Cupholders
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post #5 of 9 Old 03-25-2011, 01:30 PM
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If its sluggy in the rez its the same everywhere..
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post #6 of 9 Old 03-25-2011, 02:07 PM
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Quote:
Originally Posted by CT Performance, Inc. View Post
If its sluggy in the rez its the same everywhere..
very true. when will Bill realize the HPO system is NOT a closed system.....

goes like this......
oil pan
low pressure pump
high pressure oil pump reservoir
High pressure oil pump
injectors
back down through engine to oil pan

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Originally Posted by Ianstew
There is a difference in a government acting responsibly within their powers, and a government that just decides what their powers are and what responsibility means based on political whimsy.
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post #7 of 9 Old 03-25-2011, 04:33 PM Thread Starter
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Quote:
Originally Posted by ianstew View Post
very true. when will Bill realize the HPO system is NOT a closed system.....

goes like this......
oil pan
low pressure pump
high pressure oil pump reservoir
High pressure oil pump
injectors
back down through engine to oil pan
Just trying to make sense of the hpop circuit. Is there a diagram/explanation of how the low oil pressure enters the hpop, and returns to the motor sump? Also where the intake to the hpop is, then where does the oil, return from the injectors?
The video makes it sound as if there is a portion of the hpop that remains stagnant, so any contamimants settle at the bottom. I pumped out some thick nasty oil, the oil pan oil was no where near that bad. Mind you, this is my first oil change on the truck since I've owned it.

'02 7.3 Excursion
2007 Harley Wheels with 275/65/20 Goodyear Duratracs and Fred Goeske 2" adapters
MBRP 4" stainless turbo back
AFE Stage 2 Intake
TW 6 pos. chip:Tow, High Idle, Econo, Daily, Street, Extreme
Edge Insight with expandable EGT probe
JW valve body
V/Modded B's with 2" hangers up front, and 7 Bilsteins (CT Perf. Setup)
Oil sep CCV mod.

'02 Lightning 415/500 at the wheels.
'72 Ford Courier 302/C4/9"rear with '06 Mustang wheels.
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post #8 of 9 Old 03-25-2011, 05:30 PM
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Well not to throw a wrench into things here but don't you guys think maybe there's a possibility that the sludgy oil can get trapped in the hpop sump. It's a thought. I don't know where the lines tap into the sump but if they are both closer to the top then the bottom then that is a good possibility!!
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post #9 of 9 Old 03-25-2011, 05:49 PM
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Quote:
Originally Posted by FordPowerStroke1986 View Post
Well not to throw a wrench into things here but don't you guys think maybe there's a possibility that the sludgy oil can get trapped in the hpop sump. It's a thought. I don't know where the lines tap into the sump but if they are both closer to the top then the bottom then that is a good possibility!!
I think it helps out more then people think it does, and the oil dosen't flow through the injectors as well as people make it out to. Its only like a 7cc pump, and IDK how much its geared down off actuall RPM's but It's not flowing that much oil, just making alot of pressure.

Allen
1999.5 F-350 7.3, six-speeed

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