2005 F550 crank no start have AE

[Fcrcmach]

OkI have read through what seems like hundreds of threads on the crank no start and I thought I had it figured out. But no so I think I just need to start another.
I have a 2005 F550 6.0l initially I had an intermittent crank no start. One time it wouldn't start let it sit for a while anywhere from 15 min to an hour and it would fire. Typically in the morning upon first start but also a couple times after I went somewhere and shut it down for about an hour. Outside temps were 45-85 degrees
Now it will not start at all I have put in new oil and filter new HPOP and IPR
AE readings are
ICP cranking 0.
ICP Desired 1587
ICP Volt kOEO .24
ICP Volt Cranking .24
IPR KOEO 14.84
IPR cranking 84.77
FICM Logic Power 12.0
FICM Main Power. 48- 48.5 At all times
FICM Vehicle power 12.0
FICM Sync 1
CMP CKP Sync 1

Now after testing with AE initially and I saw zero ICP I know it must be 500 min. so I suspected the HPOP or the IPR but those are now both replaced and still have the same condition. disconnected the ICP
I Have verified I do have low pressure oil by taking out the oil filter and depressing the valve at the bottom and having someone else crank the truck.
I also performed the leak test using an IPR controller and could hear nothing that sounded like a HPO leak (another reason I suspected the IPR or HPOP)
AE is not showing any codes what so ever.

So what should I look to next? Possible bad FICM even though the voltages look correct? Any ideas to test next

[southend]

You didn't replace the dummy plugs, standpipes or stc fitting when you were in there? Thats the problem, or trash shot through your ipr sensor.

Sent from my phone that somebody didn't help me get.

[Fcrcmach]

The new hpop included the updated stc fitting pre installed as well as a new ipr which I installed even though I had ruled the ipr out due to the numbers I was getting from ae showing the ipr was working. I did not replace the standpipes for a couple reasons one i did the pressure test and did not hear any leaks and two since I installed the new hpop without removing the alternator, egr cooler, intake or coolant bottle It wasn't really any easier to do the standpipes at the same time.
The other threads I have read where the standpipes were the cause they had at least some pressure at the ICP. Has anyone had a case where the standpipes or dummy plugs caused a reading of zero at the ICP?

[southend]

The pressure test is for large leaks, the shop air does not compare to the 600-4000psi it could see. If you fix one leak others that were weak may then start.

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[Fcrcmach]

I understand the pressure test is for large leaks but considering I have zero pressure at the Icp it goes to show it would have to be a large leak. If it was a small leak I should have some pressure at the ICP.

[southend]

Crap, redo the air test, that would be the easiest approach.

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[kaya@bernhausen]

hmmm. you can't really qualify the icp reading though. i know you said you disconnected it which will default to calculated values. but what if something else were not allowing it to start and you are only under the assumption that this is an icp issue.
how about this; does the OP gauge rise while cranking?
if you air tested it and didn't hear anything, it's not a leak issue. air is thinner than oil and will expose a leak. even at 100psi

[southend]

Originally Posted by kaya@bernhausen

hmmm. you can't really qualify the icp reading though. i know you said you disconnected it which will default to calculated values. but what if something else were not allowing it to start and you are only under the assumption that this is an icp issue.
how about this; does the OP gauge rise while cranking?
if you air tested it and didn't hear anything, it's not a leak issue. air is thinner than oil and will expose a leak. even at 100psi

Originally Posted by southend

The pressure test is for large leaks, the shop air does not compare to the 600-4000psi it could see. If you fix one leak others that were weak may then start.

Sent from my phone that somebody didn't help me get.

I stand by my statement without getting too technical.

Sent from my phone that somebody didn't help me get.

[twoicebergs]

Maybe the HPOP/IPR were not the problem for the low HP oil in the first instance. I suspect it was, but a seal in the standpipe or dummy plugs remains a possibility.

If it is not the LPOP, it could be crud or junk on the valley filter under the oil cooler from the HPOP failing.

[sinner6.0L]

For a leak to cause absolutely no pressure I agree that is kind of weird. Your ICP voltage reading KOEO is perfect but that doesn't mean it's a good sensor.

did you remove the plug from the bottom of the high pressure oil pump before installing it?