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Old 03-25-2014, 06:25 AM
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Hpop problems

I have a 01 f250, 210k, the hpop was replaced around 20k ago. I believe it was from napa. It has the original ICP and IPR. The problem I'm having is low pressure. I will attach some pics at the end. When it still kinda cold I can hit 3000 psi but when warm I can't get past 2500 psi but is usually around the 2200 mark. First pic is cruse set at 80. Second pic is at wot. Any suggestions in how to fix this would be great.

Last edited by sbluke55; 10-25-2014 at 05:08 PM.
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Old 03-25-2014, 07:10 AM
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Also has cold start issue
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Old 03-25-2014, 07:19 AM
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tuned? Inj's? any leaks from the icp? and leaks in general? could be o-rings on inj's could be hpop, buzz test pass? lots could still be going on.
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Old 03-25-2014, 07:24 AM
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Yes tuned. I have the hydra on the 100hp setting. ICP is clean. Original injectors but I know my injectors need replaced sometime. Its dirty on top by the spider but I think it is from the boots. Replaced orings on head where the hpop lines connect. I didn't buzz test it. Can you do that from torque.
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Old 03-25-2014, 07:59 AM
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I've herd both ways (I dont have it...yet) about the buzz test. you have a boost guage? if so about is it reading? not part of the cold start but if your lower then normal it could be that....and a hot tune will show a weak/not perfect hpop too, so if it does it on the lower tunes too then it could be an issue.
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Old 03-25-2014, 08:02 AM
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I don't have s boost gauge but I have it set up in my torque app. I'll out it to stock tonight and see what it does. It sucks because the hpop isn't very old and its the third one.

Last edited by sbluke55; 03-25-2014 at 08:06 AM.
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Old 03-25-2014, 10:03 AM
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It is hard to tell if your injectors just need some new orings or maybe just need some work. Or it just could be a ****ty pump.

You know sometimes when it is heat related I have seen the coil on the IPR actually shut the truck off when it is warm. That is the little deal that is held on by the little nut on the IPR.


Here are some other good reads...
http://www.swampsdiesel.com/site/how...f/pdf/hpop.pdf
http://www.swampsdiesel.com/files/7....Diagnostic.pdf
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