2001 7.3 High Pop Empty
Mountain Pass
Joined: Jan 2011
Posts: 126
Likes: 13
From: Buckley
I agree. Need to dead head HPOP.
Pull IPR, clean and reseal.
test IPR coil cold and hot IIRC 10.7ohms is coming to mind.
Lead Driver
Joined: Jul 2017
Posts: 6,863
Likes: 2,335
From: WV
Originally Posted by robjs111
Should oil be flowing out of icp opening when motor is turned over?
I agree with Tpayne. Either the IPR or HPOP are done if your reservoir was full while not getting oil out of the ICP hole. Seems like most people have at least a little bit of flow when the IPR is bad so I’m leaning towards HPOP. I think using an IPR block off tool could confirm.
Cargo Master
Joined: Apr 2022
Posts: 3,203
Likes: 1,704
Correct. That's what the pcm was commanding the ipr to do. Doesn't mean it was actually doing it. I've had them fail and stick before and wouldn't build pressure. And had another where the magnet solenoid part would quit when it got hot and would cause a no start no run until it cooled off.
Thread Starter
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Fleet Mechanic
Joined: Dec 2006
Posts: 1,388
Likes: 6
I thought even with a bad ipr I should still see oil in rails after icp has been pulled? A good hpop when motor is cranking will produce some oil pressure regardless or maybe I’m not fully understanding. I know oil flow splits after lpop, one side to oil cooler and other to engine and could take a bit to flow out of icp opening.
thanks
thanks
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Cargo Master
Joined: Apr 2022
Posts: 3,203
Likes: 1,704
If ipr is stuck open or a issue with the wiring it will be bypassing most if not all of the oil the hpop is producing straight back to the oil pan.
Notn aying the ipr is 100% the issue but I have had 2 go bad and cause a no start no run. I did not take the icp sensor out to check for oil in the rails at that time though.
Notn aying the ipr is 100% the issue but I have had 2 go bad and cause a no start no run. I did not take the icp sensor out to check for oil in the rails at that time though.
Cargo Master
Joined: Apr 2012
Posts: 2,031
Likes: 533
From: Bottom Of Pikes Peak
I've been wanting to stay away from this nightmare and just follow...
how did you spill coolant....shouldn't nee to remove any coolant lines to access HPOP or cover/ resi.
you said you got a bunch of metal in the resi screen...this tells me the pump came apart and probably clogged your IPR as well. if you have the skills, you can possibly rebuilt the IPR, but I'm pretty sure you toasted your HPOP or it toasted itself...that's what my Stealth SRP did...was fine until it just failed for no reason
how did you spill coolant....shouldn't nee to remove any coolant lines to access HPOP or cover/ resi.
you said you got a bunch of metal in the resi screen...this tells me the pump came apart and probably clogged your IPR as well. if you have the skills, you can possibly rebuilt the IPR, but I'm pretty sure you toasted your HPOP or it toasted itself...that's what my Stealth SRP did...was fine until it just failed for no reason
Thread Starter
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Fleet Mechanic
Joined: Dec 2006
Posts: 1,388
Likes: 6
I've been wanting to stay away from this nightmare and just follow...
how did you spill coolant....shouldn't nee to remove any coolant lines to access HPOP or cover/ resi.
you said you got a bunch of metal in the resi screen...this tells me the pump came apart and probably clogged your IPR as well. if you have the skills, you can possibly rebuilt the IPR, but I'm pretty sure you toasted your HPOP or it toasted itself...that's what my Stealth SRP did...was fine until it just failed for no reason
how did you spill coolant....shouldn't nee to remove any coolant lines to access HPOP or cover/ resi.
you said you got a bunch of metal in the resi screen...this tells me the pump came apart and probably clogged your IPR as well. if you have the skills, you can possibly rebuilt the IPR, but I'm pretty sure you toasted your HPOP or it toasted itself...that's what my Stealth SRP did...was fine until it just failed for no reason
The actual pieces of metal are aluminum so not sure what part of oil system is compromised of aluminum. Not sure what hpop is made of but guessing aluminum but pieces would have to travel out of pump and make their way back around oil system which I guess is possible. What’s makes a hpop break apart?
Thread Starter
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Fleet Mechanic
Joined: Dec 2006
Posts: 1,388
Likes: 6
Yes
flow to the reservoir is good, I did not measure psi, should be between 7 - 12, but did a quick video of oil flowing out of reservoir fill port. Seems all that has been done points to hpop, which I installed November 2018.
flow to the reservoir is good, I did not measure psi, should be between 7 - 12, but did a quick video of oil flowing out of reservoir fill port. Seems all that has been done points to hpop, which I installed November 2018.