Still wont run....hpop maybe? - Ford Powerstroke Diesel Forum
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post #1 of 10 Old 04-01-2011, 05:33 PM Thread Starter
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Still wont run....hpop maybe?

So i fixed my slow turning problem. The truck has 2 new batteries, and the starter off my other 7.3L and is spinning like a champ. But it makes a weird noise, almost a hollow thumping sound coming from somewhere. I checked the HPOP and its completely empty? Any input would be very helpful.
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post #2 of 10 Old 04-02-2011, 04:21 AM
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Originally Posted by tbarbee View Post
So i fixed my slow turning problem. The truck has 2 new batteries, and the starter off my other 7.3L and is spinning like a champ. But it makes a weird noise, almost a hollow thumping sound coming from somewhere. I checked the HPOP and its completely empty? Any input would be very helpful.
Thats not good... I believe the HPOP Res is supposed to be about 1" from the top. You have any leaks?
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post #3 of 10 Old 04-02-2011, 04:51 AM Thread Starter
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I thought that as well. I bought the truck not running so I can't say what's leaking for sure. But there's evidence that something has leaked at some point. I would guess it was the turbo pedestal. The hp oil lines are brand new and it was at the back whatever it was.
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post #4 of 10 Old 04-02-2011, 06:09 AM
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Fill the Rez up and try it again but the Rez should fill by itself while cranking could be your low end pump in the pan
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post #5 of 10 Old 04-02-2011, 07:03 AM Thread Starter
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I was thinkin of trying that this afternoon. If I fill it up and it trys to run is it more then likely gonna be the low end pump?
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post #6 of 10 Old 04-02-2011, 07:33 AM
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If it stays running I wouldn't think so the way I understand it after the oil goes through the injector it returns to the pan the sump pump sends more oil to the hpo Rez. If it run I'd let it run for a bit then shut it off and wait for a couple hours maybe even over night to see if the oil bleeds out of the Rez then find the leak
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post #7 of 10 Old 04-02-2011, 08:24 AM Thread Starter
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But if the pump in the pan is bad after the oil hits the pan again it won't beable to send it back up to the hpop would it? Unless once the truck was running and the hpop could pull it up on its own? I get what your sayin about it leakin back down though, that would make the hpop loose prime and not fire the injectors.
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post #8 of 10 Old 04-02-2011, 12:15 PM Thread Starter
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I just filled the rez up about an inch from the top, turned the truck over for about 20 seconds, and checked it again. Completely empty again? Any thoughts?
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post #9 of 10 Old 04-03-2011, 05:27 AM
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Did it fire up and run I would think something is allowing the oil to leak out of the Rez I'm having the same problem mine isnt leaking all the way down I'm losing about half a quart maybe someone will chime in that knows the hpo system
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post #10 of 10 Old 04-03-2011, 08:11 AM Thread Starter
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No it did not run at all.
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