LPOP help...
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Hotshot
Joined: Jul 2008
Posts: 11,231
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From: Thomasville, GA
Update:
They said that the LPOP is working, but not as well as it should be. Also, they said the ICP valve isn't working?
They said they don't have the tools needed to fix it so they have to get them from a different stealership.
Anyone have some wisdom for me?
They said that the LPOP is working, but not as well as it should be. Also, they said the ICP valve isn't working?
They said they don't have the tools needed to fix it so they have to get them from a different stealership.
Anyone have some wisdom for me?
Hotshot
Joined: Aug 2006
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They must mean IPR valve , rather than ICP
The LPOP just has to keep the res sufficiently full under WOT. BTW, how did they test the LPOP ?
If they are not getting ICP pressure , It can still be any of the things we mentioned .Don't let them throw parts at it unless they are willing to assume the responsibility for the ones that don't work..
The LPOP just has to keep the res sufficiently full under WOT. BTW, how did they test the LPOP ?
If they are not getting ICP pressure , It can still be any of the things we mentioned .Don't let them throw parts at it unless they are willing to assume the responsibility for the ones that don't work..
Post Fiend
Joined: Feb 2009
Posts: 8,773
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From: Texas Coast
They must mean IPR valve , rather than ICP
The LPOP just has to keep the res sufficiently full under WOT. BTW, how did they test the LPOP ?
If they are not getting ICP pressure , It can still be any of the things we mentioned .Don't let them throw parts at it unless they are willing to assume the responsibility for the ones that don't work..
The LPOP just has to keep the res sufficiently full under WOT. BTW, how did they test the LPOP ?
If they are not getting ICP pressure , It can still be any of the things we mentioned .Don't let them throw parts at it unless they are willing to assume the responsibility for the ones that don't work..
Thats it Rick
Evan bring it home if you can. Run and pressure check on the lpop and see if it needs shimming. Pull the IPR and clean it and replace the o-rings. Inspect the icp for oil at the connection point. Trace the wires to the valley and ensure that there are not any insulation issues. Check inside theh fuel bowl as I had some weird things happen when the fuel pressure regulator stuck due to hard particulate matter that slipped by the stand pipe strainer. Then post back.
Post Fiend
Joined: Mar 2007
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From: Texas
I'm inclined to agree with the others. What special tool do they need to replace the IPR? A deep socket from NAPA?
Why not? It's a drain valve. If it get's stuck or commanded open when the engine is not cranking, won't it let the oil drain down? Shorted wires on the IPR can cause it to hang open.
Why not? It's a drain valve. If it get's stuck or commanded open when the engine is not cranking, won't it let the oil drain down? Shorted wires on the IPR can cause it to hang open.
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From: North East Ohio
Keep in mind that the IPR valve is normally open with the motor off, and it doesn't leak oil or the res would be empty every time the truck sits while shut down.
It takes voltage and oil pressure to close the valve. If it hangs open the motor will not start and it will not build more then 180 psi or so in the HPOil system, if I recall.
Evan's issue, IMO, is directly related to the HPOil res leaking down, or inability to get filled up. Neither of which, IMO, has to do with the IPR.
It takes voltage and oil pressure to close the valve. If it hangs open the motor will not start and it will not build more then 180 psi or so in the HPOil system, if I recall.
Evan's issue, IMO, is directly related to the HPOil res leaking down, or inability to get filled up. Neither of which, IMO, has to do with the IPR.
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Hotshot
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Keep in mind that the IPR valve is normally open with the motor off, and it doesn't leak oil or the res would be empty every time the truck sits while shut down.
It takes voltage and oil pressure to close the valve. If it hangs open the motor will not start and it will not build more then 180 psi or so in the HPOil system, if I recall.
Evan's issue, IMO, is directly related to the HPOil res leaking down, or inability to get filled up. Neither of which, IMO, has to do with the IPR.
It takes voltage and oil pressure to close the valve. If it hangs open the motor will not start and it will not build more then 180 psi or so in the HPOil system, if I recall.
Evan's issue, IMO, is directly related to the HPOil res leaking down, or inability to get filled up. Neither of which, IMO, has to do with the IPR.
Could also still be the LPOP, but they normally fail over time ..The drain back valve in the block can also fail along with the res gasket ...
On edit , an O ring might be last on the list
Post Fiend
Joined: Mar 2007
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From: Texas
Keep in mind that the IPR valve is normally open with the motor off, and it doesn't leak oil or the res would be empty every time the truck sits while shut down.
It takes voltage and oil pressure to close the valve. If it hangs open the motor will not start and it will not build more then 180 psi or so in the HPOil system, if I recall.
It takes voltage and oil pressure to close the valve. If it hangs open the motor will not start and it will not build more then 180 psi or so in the HPOil system, if I recall.
If it hung open while cranking, then it would theoretically show somewhere around LPO pressure, right? So what's causing the drain down? Check ball leaks are pretty rare, a suddenly completely dead LPOP seems unlikely. Front cover finally worn beyond repair? Cracked pick up tube? What the heck causes one of those to suddenly crack?
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From: metairie, LA
Keep in mind that the IPR valve is normally open with the motor off, and it doesn't leak oil or the res would be empty every time the truck sits while shut down.
It takes voltage and oil pressure to close the valve. If it hangs open the motor will not start and it will not build more then 180 psi or so in the HPOil system, if I recall.
Evan's issue, IMO, is directly related to the HPOil res leaking down, or inability to get filled up. Neither of which, IMO, has to do with the IPR.
It takes voltage and oil pressure to close the valve. If it hangs open the motor will not start and it will not build more then 180 psi or so in the HPOil system, if I recall.
Evan's issue, IMO, is directly related to the HPOil res leaking down, or inability to get filled up. Neither of which, IMO, has to do with the IPR.
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Hotshot
Joined: Jul 2008
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From: Thomasville, GA
Whatever the case, I feel that it is beyond what I can do at home.
I'm active duty, have a new baby at home, and just dont' have the time, space, or tools to do work on all these things that you guys are suggesting. I hope that they can get this fixed soon, and that it won't cost too much.
I'm active duty, have a new baby at home, and just dont' have the time, space, or tools to do work on all these things that you guys are suggesting. I hope that they can get this fixed soon, and that it won't cost too much.
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Joined: Sep 2007
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From: Medford Oregon
Here is the original post ... https://www.ford-trucks.com/forums/9...ight-help.html
Lets go back to square one and re-read the original problem ...
Note he pulled a couple injectors to fix the miss. Dollar to a dime when he got on it going home passing the vehicle (high oil pressure) one of the top injector o-rings blew out. Now I'm not smart enough to know exactly what would happen but I would think that injector would flood the valve cover starving oil from other injectors and certainly draining the HPOP reservoir.
Lets go back to square one and re-read the original problem ...
Note he pulled a couple injectors to fix the miss. Dollar to a dime when he got on it going home passing the vehicle (high oil pressure) one of the top injector o-rings blew out. Now I'm not smart enough to know exactly what would happen but I would think that injector would flood the valve cover starving oil from other injectors and certainly draining the HPOP reservoir.
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Hotshot
Joined: Jul 2008
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From: Thomasville, GA
See, my plan right now is to get the oil problem fixed, then pull all the injectors again and send them to Jim for him to look through. I did the DIY Stage I's about 2 months ago and had some problems with the engine missing.
I really hope that it isn't just a blown injector o-ring... that would really be a waste of time and money for me having the shop working on it.
I really hope that it isn't just a blown injector o-ring... that would really be a waste of time and money for me having the shop working on it.