Thinking my HPOP is bad. Need some help diagnosing. - Ford Powerstroke Diesel Forum
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post #1 of 9 Old 04-21-2013, 05:29 PM Thread Starter
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Thinking my HPOP is bad. Need some help diagnosing.

First off the truck is a 2003 with 172k miles with probably the original HPOP. Many months ago the ICP started to leak oil so while replacing the ICP and harness I went ahead and did a few extra things. I replaced the O-ring on the top side of the HPOP between the dicharge tube and HPOP. I also replaced that entire tube with a new one from Ford since there was also an O-ring inside of that tube as well. I removed the IPR and there were a few flakes of metal on the screen which i cleaned off.

So recently my truck has been lagging badly past 1/4 throttle. Using my Edge CTS I finally noticed that when i'm past 1/4 throttle my ICP will not go past 1.0 no matter how far I press the pedal and the engine sounds VERY labored. When I quickly get off the pedal the ICP will flash really quick to around 4. Also I was running the truck a few days ago to try and check a few things out and once I tried to restart it it would not start, icp voltage only came up to .5 - .7. After it cooled down it finally would start.

I'm almost certain I need a new HPOP but I wanted to have any other ideas in case I am wrong, where else I could look.

Thanks for any help!

2003 F250 Lariat FX4 CCSB 6.0 PSD - Diamond Eye Stainless 4" Straight Pipe, Edge CTS
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post #2 of 9 Old 04-21-2013, 06:38 PM
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Sounds like HPOP is almost out. An air test needs to be next at this point.



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post #3 of 9 Old 04-21-2013, 06:57 PM
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Quote:
Originally Posted by toren302 View Post
Sounds like HPOP is almost out. An air test needs to be next at this point.
Test for air leaking with oil filer cap removed and IPR commanded closed. If you hear excessive air, the pump is junk.

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post #4 of 9 Old 04-22-2013, 04:01 AM Thread Starter
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Thanks for the replies! So I pull the ICP and need to install an adapter for air, then power the IPR and listen for air leaks? If thats right then i'm going to try to do that today. Wish the damn thing wasn't such a pain to get to!

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post #5 of 9 Old 04-23-2013, 06:06 PM
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when my hpop died the truck would not start. On a Mentor the oil pressure reading was 125, needed to be much higher
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post #6 of 9 Old 04-30-2013, 06:12 AM Thread Starter
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Well I didn't seem to have any air leaks at all. I tore down everything and put air direct thru the discharge tube and still didn't hear anything. The IPR had a bunch of metal flakes all over and spinning the old HPOP by hand it would lock up frequently while spinning in the proper direction. I figure it must be bad so thats what I got along with a new IPR. The new one certainly feels and sounds much better. So hopefully today i'll know if this works or not. The HPOP probably was on its way out anyway so it had to be done. Will post update later.

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post #7 of 9 Old 04-30-2013, 06:45 AM
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if the ipr had chunks in the screen , it can be the pump , make sure that you are getting oil into the oil filter housing by holding down the plunger in the bottom of the filter housing and spin engine over and see how fast it fills up, should fill in just a few seconds, reason i say this is , i have seen ipr with debris in them and it be coming from the low pressure pump being chewed up

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post #8 of 9 Old 04-30-2013, 06:54 AM Thread Starter
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Thanks for the reply. I will check that after I get a few things buttoned up. Forgot to get an HPOP cover gasket so on my way to get it now.

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post #9 of 9 Old 04-30-2013, 02:24 PM Thread Starter
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Got it all done. Back to ripping burnouts. It actually feels better now than it did when I first got the truck. ICP voltage is coming up higher too at WOT. I think we are solved here. Will update if it fails but for now i'm back on the road and VERY HAPPY!

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