HPOP problem need help - Ford Powerstroke Diesel Forum
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post #1 of 45 Old 01-01-2014, 03:28 PM Thread Starter
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HPOP problem need help

I have a 1995 Powerstroke with an automatic behind it and cannot get it to start so here we go....

Has new:
ICP sensor
UVCHs both sides
Valve cover gaskets
Cam pos. sensor
EBP sensor
Starter
Batteries
Starter solenoid
IDM
PCM
It doesnt even try to start, it will crank forever but not fire. I was told to check the LPOP and the HPOP for flow. The LPOP is flowing 22PSI while cranking but I loosened the HPOP line to the drivers side oil rail on the head to the last thread or so and when I had the woman crank it over the oil just kind of puked out, it didnt act as if there was any pressure. So whats my problem guys? We have all the Pro's here! So show me the way!

I know this would be crazy to ask anyone but do any of you have a video of a HPO line unhooked while cranking over? I would really like to see if mine is acting proper or not and it would help with knowing how much flow there should be!

I need to get this thing going bad its being a PITA for me! Thanks guys hope to hear from you!
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post #2 of 45 Old 01-02-2014, 05:16 PM Thread Starter
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Any body know if the oil should blow out or just pour out? I would think it would be blowing out like a pressure washer just dont know for sure!
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post #3 of 45 Old 01-02-2014, 07:12 PM
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I've never done it. Is the HPOP Reservoir remaining full or emptying? You might need to deadhead the pump with a 0-5000 psi gauge on it to see if the pump is working and that there are no HP system leaks in the rails/injectors. Or you can try the following (here's a quicky version):

Use test plugs tool # D94T 6600 A for 94 thru 98 MY
- Block off right bank (passenger side).
- Attempt to start
- Start indicates leak in right bank
- Reconnect hose to right bank
- Remove right side valve cover.
- Unplug injector connectors at both valve covers
- Crank the engine
- Observe spill spout of the injector and top of injector bore for oil leakage.
(No oil should be coming from the spill spouts or around the injector)
- Replace injector if oil leaks from spill spout or o-rings if leak is from injector bore.

If no start - leak/loss may not be in right head, but ICP still low
- Block off left bank and move ICP into adapter
- Attempt to start
- Start indicates leak in left bank
- Reconnect hose to left bank and install ICP into left head
- Remove left side valve cover.
- Unplug injector connectors at both valve covers
- Crank the engine
- Observe spill spout of the injector and top of injector bore for oil leakage.
(No oil should be coming from the spill spouts or around the injector)
- Replace injector if oil leaks from spill spout or o-rings if leak is from injector bore.

If no start / low ICP on both previous tests
- Block off both high pressure lines
- Crank engine
- If pressure is below 1000 psi remove IPR valve and inspect o-rings.
- If the IPR valve o-rings are damaged replace them with kit # F6TZ-9C977-AA and retest.
- If o-rings are ok, then replace the IPR valve and retest.

Cheers!

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SOLD - 1994 F350 CC DRW 2WD PSD, 5 Speed, 4.10 LS, SBC Con-O, Baldwin Filter, Tymar HPX Hose, DPPI DP, Bilsteins, $12 AIC, Coolant Filter, Explorer Overhead Console, A-Pillar w/ISSPRO Black Ice, EV Boost, and EV Pyro, Modified Pedestal, Gutted EBPV.
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post #4 of 45 Old 01-02-2014, 07:49 PM
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Does the tach read rpms when your turning it over if not check or change cps

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post #5 of 45 Old 01-02-2014, 07:53 PM
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Pressure is only built when pdm commands ipr to close if you have no pressure but you have oil flow it's the ipr

Which could mean that the ipr is bad itself or the pcm is not telling it what to do

If the cps is bad ie no tach movement the ecm has no idea that the engine is turning over which will cause the pcm to do nothing

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post #6 of 45 Old 01-02-2014, 11:13 PM Thread Starter
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machinestheman, the tach does move and it has brand new cps and new IPR valve, HPOP res stays within 1 of thie top. If I top it off it will stay there for awhile, a few tries later its about 1/2 to inch away.

I've applied 12v to IPR to ensure its closed during cranking once and it still didn't change it.

Ill take a video of it in the morning to show you what I mean by it oozing out. Thanks Patrick for the process Ill see what I can make it do!
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post #7 of 45 Old 01-03-2014, 06:41 PM Thread Starter
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Well work kept me from making a video hopefully in the AM I can get one for you guys, I have a friend bringing a good working HPOP and will try it just for the heck of it.
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post #8 of 45 Old 01-04-2014, 02:05 PM Thread Starter
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OK Finally made a video but I had to put onto youtube instead computer wouldnt allow me to put it on here but atleast you get to see it. Is this enough flow or not? I dont know what else it could be! Im about to throw it away, but the potential it has and OBS is what keeps it sitting here! Thanks guys just hope to get it running!


this is the link to the vid on youtube. If it doesnt work the title is " 7.3 powerstroke HPOP not flowing enough? " Thanks
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post #9 of 45 Old 01-04-2014, 05:06 PM Thread Starter
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I don't have gauges or anything to measure the HPOP pressure so does this look like enough oil?
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post #10 of 45 Old 01-04-2014, 05:16 PM
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That doesnt seem like enough. Lets start from scratch here. The CPS, just cause the tach bounces doesnt mean its good. Spend 20 bucks or borrow a known good one and try that. They have come brand new and bad.

The IPR itself? ever been taken out and cleaned? if not thats not a bad thing to do. I do mine every so often just as a preventative.

You said you replaced the IDM and the PCM. Why did you do that?? I am just asking

Lastly that HPO line should be just going nuts when cranking in my mind. Ive seen HPO lines blow and well what I am seeing wouldnt even burst a rubber hose. I am putting my money towards a bad HPOP or a gummed up IPR

EDIT: Also 12v to the IPR isnt good IIRC, should only be a 5v reference signal

Trucks and parts............
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