Engine Won't Turn Over IPR or HPOP - Ford Powerstroke Diesel Forum
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Old 04-09-2014, 05:53 PM
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Engine Won't Turn Over IPR or HPOP

This is a follow-up to an earlier post figure I would jump off fresh with the new information I am working on. During the cold months my '96 Powerstroke wouldn't start, it had been sitting for about a month and with the cold I thought I needed to plug it in. Still nothing. At first it would crank and try and turn over after a little bit not even that, it just cranks away and never even tries to turn. No smoke and the tach jumps slightly.

I have done the glow plugs recently and been keeping the batteries charged. I brought the starter in and had it tested to make sure it was doing the job and it passed a couple tries. I disconnected the CPS connector and still got the same behavior, though the tach stopped jumping so I assume it isn't the CPS.

In my last post the main suggestion was IPR, so I was just getting ready to do that, but while I researching that I had my "ahha" moment, where I kicked myself for being new to diesels. I had checked my oil level and seen it fine, but I had neglected the HPOP.

My oil level was right on target which was weird because I have a main seal leak I hadn't gotten around to fixing, and I found my HPOP was empty.

So this is where my questions start, once again sorry new to diesels, and just trying to wrap my head around how the components tie together. I assume a leak in oil could cause my HPOP to empty into the rest, correct? Unfortunately when I refilled it till it was plug level I still couldn't start it.

Then the next day I found my level had dropped again, but no obvious leaks. Topped it off again and more cranking. Still no starting but once again my level has dropped. I believe I saw bubbles rising up so I assume it is slowly sinking it to the other parts. So I topped off again. At this point I have put in 2 1/2 quarts, still no signs of any leaking out, but still no starting.

Is the IPR related to HPOP oil at all that could be causing this? Is it just that I need to get this topped off and then I might be in luck? Or is it a bigger issue and oil is going to just keep going to the lower level and it won't ever stay topped off?

Thanks again for the help, just trying to figure out if I am at the point where I know whats going on, or completely off base.

Cheers!
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Old 04-09-2014, 06:29 PM
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So has the oil level risen in the crankcase as you have added oil to the HPOP reservoir?
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Old 04-09-2014, 06:37 PM
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You may have air in hpo, but it should start within a couple of cranking cycles. I'm still pretty sure you need an IPR to get it going
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Old 04-09-2014, 06:53 PM
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yeah it definitely sounds like an ipr to me too. Check the harness going to the ipr too, it can go bad as well.
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Old 04-09-2014, 08:46 PM
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Looks like the oil level has gone up about a quarter of an inch...it was just below the fill level now it is just above.

Thanks for the additional information, I'll try and pump out what oil I can from the HPOP and then look at replacing the IPR and double check the harness.
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Old 04-10-2014, 05:26 AM
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You dont necessarily have to drain the reservoir to change your IPR, when you remove your IPR a cork from a wine bottle or something similar will stop up the hole to keep the oil from running out.
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