Question is, what would stop the HPO system from getting oil to the rails.

While working on my truck i am helping a buddy work on his. He replaced the HPOP and I helped him leak check his system. His HPO system is tight. While cranking He get good oil pressure on the gauge but no ICP pressure. (I used my scan gauge II to help him troubleshoot). So i used the trick i learned from this forum. using the same air check fitting and an old air hose I had him crank it and there is actually no oil going to the ICP port.

I realize that doing the air leak check blows all the oil out of the rails but the amount of times we hand cranked it (20-25 for 20 seconds a times we monitor the batts and swap them out with the ones from his fathers truck)

 

does Oil Fill the Oil Filter house while ceranking

And you screwed in a Manual Pressure gauge into ICP Port and had NOTHING

 

what year is Buddy truck??

 

Did your friend make sure to remove the plastic plug on the suction side ( bottom ) of the pump and did he install the suction side oring?

 

He stated he did remove the plugs and installed the o-ring. He has done this job before and is confident he did it correctly.
The filter housing does fill with oil when he cranks it within a few seconds.
The truck is a 05 F-250 XLT 4X4 with no mods just upgrades to correct Fords deficiencies. It has 127779 miles on it.
Did not put a gauge at the ICP port but cranked with nothing there and no oil went into the oil rail

 

The real question is why did you replace the HPOP at 128k miles. These pumps don't normally go out at all.

There is a screen on the bottom of the reservoir under the oil cooler. There is also a screen on the IPR valve. Maybe there is some debris clogging one of the screens not allowing oil to get to the HPOP.

.

 

Really that contradicts all the research I have done stating HPO leaks, FICM and HPO Pumps are the leading cause of no starts or engine failure. Came across several trucks with less than 100k that had to have the HPOP replaced and not because of contaminated fuel/oil or anything crazy like that. The pump just got weak and failed.

 

The 05' and newer model HPOP's rarely fail, as a couple of master techs on here have stated that in all the years they have been wrenching on the 6.0L they have only needed to replace a couple of the 05' and up HPOP's, now the 03' / 04' is a completely different story.

 

Sorry, I think my post came off as offensive.

It's the 03, and 04 pumps that have a high failure rate. The 2005 and up pumps are a different design. However, some of the HPO system components do have a high fail rate, STC fitting, Stand pipes, Dummy plugs, to name a few.

It may help to know what the original problem was. I am thinking you may not have solved it yet.

Again, no offense, I am just throwing out what pops into my head.


.

 

None taken trust me. I am here for help, I was just letting you know what I have been told and found out over the years. I know the late 04, 05 and up have a different design and are better that previous.
Not trying to insult anyone's intelligence or anything here, I am the rookie looking for help.
The original problem was that the truck shut off on him while driving to work and wouldn't restart. He had it towed and ran a scanner on it. It told him he had a p2290 (I think) which I believe is ICP pressure low. He removed the ICP tried to start it and it wouldn't then he checked the IPR and found the screen had a rip in it. He ended up replacing the HPOP, IPR and ICP. Got me involved when it still wouldn't start knowing i had fixed PSD's in the past. i used shop air to check his HPO system and it sounded fine. Normally if you remove the ICP oil will shoot out as you unscrew it but in this case the rail was empty after numerous cranks, so it's like oil is not getting to the rails. Also there are no DTC recorded

 

It does sound like oil is not getting to the pump, and the way I read this you have good LPO. I would check the IPR screen again.

A good vid.



I know the new oil cooler from Ford comes with an updated screen.

Also check the oil cap. If it is not a Ford cap with a Ford filter it could be letting unfiltered oil past the filter.

.

 

Excellent vid in deed.
I ended up changing the oil filter housing and the filter. It had an after market taller filter cap so just to eliminate the filter and cap miss-match they are now both OEM. I have ICP pressure now but the scan gauge says it's at 1500+ psi so it should start? Unless the IPR is bad?

 

yes it should start at 1500psi ICP BUT

Is it in default?? is your ICP sensor plugged in???

Post ICPV at KOEO

and did you verify Oil Flow to the filter house during cranking
If you did was it a Fairly GOOD Flow of oil????????????

 

Yes ICP is plugged in. I was shocked too when ICP got up to 1500+psi and it didn't start.

Yes there is a good flow of oil into the housing when the filter and cap is removed.

Current readings: KOEO
FLP=12v
FVP=12v
FMP=48.5-49v
ICP=0
ICV=4.23
IPR=14.4
SYC=0

 

That shows a BAD ICP Sensor

You also have sync Problem be it the gauge or the truck

Post FPW while cranking