LPOP help...
Hotshot
Joined: Aug 2006
Posts: 10,764
Likes: 39
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.
Hopefully the dealer uses a gauge
Postmaster
Joined: Sep 2007
Posts: 4,195
Likes: 6
From: Medford Oregon
I had a link to another site where the problem was pretty much the issue. Unfortunately it got lost. I'll see if I can find it. Basically, as I recall, #2 cylinder top o-ring was destroyed and he could fill the HPOP and the truck would start and run for 3-5 seconds then die and HPOP reservoir was empty.
Brownie, I only mention this because no one else has and hopefully the shop you have it at has not pulled the injectors yet to check it out. If not I would would be asking them to do that before any other major repair possible solution. If nothing else go down and pull them yourself if they will let you. It might be that simple or quite possibly I'm a nut .. wife thinks so.
Brownie, I only mention this because no one else has and hopefully the shop you have it at has not pulled the injectors yet to check it out. If not I would would be asking them to do that before any other major repair possible solution. If nothing else go down and pull them yourself if they will let you. It might be that simple or quite possibly I'm a nut .. wife thinks so.
PREMIUM SPONSOR
Joined: Sep 2003
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From: North East Ohio
Before I pulled injectors and suspect an o-ring, I'd take a reading on the HPOil system with a gauge. Then block off the pump eliminating the heads altogether and take another reading right at the pump. If pressure jumps then you know it's in a head. Then connect one head and test again, then the other to find which head has the issue.
If pressure stays low then it's something else and not injectors or inj. o-ring.
It's quite possible that the IPR stuck open and the LPOP can't keep up the res, but not likely if the LPOP is in good shape.
Evan, maybe discuss some of these things with the shop it's at and hopefully they will understand that you do know quite a bit about the 7.3 and just want to make sure they are not throwing your money away.
Tread gently as none of us likes a customer looking over our shoulder.
If pressure stays low then it's something else and not injectors or inj. o-ring.
It's quite possible that the IPR stuck open and the LPOP can't keep up the res, but not likely if the LPOP is in good shape.
Evan, maybe discuss some of these things with the shop it's at and hopefully they will understand that you do know quite a bit about the 7.3 and just want to make sure they are not throwing your money away.
Tread gently as none of us likes a customer looking over our shoulder.
__________________
'96 7.3 F-350 Reg Cab 4x4 - bought new.
'04 6.0 E-350 custom 4x4
'08 6.4 F-550 Reg Cab 6 spd 4x4
'17 6.7 F-250 KR ccsb 4x4
'96 7.3 F-350 Reg Cab 4x4 - bought new.
'04 6.0 E-350 custom 4x4
'08 6.4 F-550 Reg Cab 6 spd 4x4
'17 6.7 F-250 KR ccsb 4x4
Thread Starter
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Hotshot
Joined: Jul 2008
Posts: 11,231
Likes: 130
From: Thomasville, GA
Thanks Jim and Jim,
I'll try to mention those possibilities without being overbearing. I know how it is to be micro-managed and have someone breathing down your neck the whole time (aka military).
They said that the LPOP was still working but not at peak efficiency, but most people on here said that it will gradually wear out over time and usually not fail all at once.
The IPR being stuck open or a bad o-ring sounds like the most likely problem.
I'll try to mention those possibilities without being overbearing. I know how it is to be micro-managed and have someone breathing down your neck the whole time (aka military).
They said that the LPOP was still working but not at peak efficiency, but most people on here said that it will gradually wear out over time and usually not fail all at once.
The IPR being stuck open or a bad o-ring sounds like the most likely problem.
Junior User
Joined: Oct 2007
Posts: 91
Likes: 0
Good writeup and pictures. Do you guys have those special tools, or is there another way to pull seal and reinstall. I don't have those tools, and wonder whether you rent them or make something to do the job?
Hotshot
Joined: Aug 2006
Posts: 10,764
Likes: 39
I've been complaining about my search function not working for a while , glad some one posted the old thread . I dismissed the O rings (based on what I remembered ) from the other thread , thought they were new. Seemingly no leaks after second install. BTW , what was the problem with the injectors that were missing & repaired ?
Hotshot
Joined: Oct 2003
Posts: 17,791
Likes: 99
From: Ashland City, TN
I don't understand how it can be an o-ring problem if he reinstalled the 2 injectors then drove it around before the problem occurred.
IRP is probably stuck if that is the case.
It's a really strange device.
My truck idle's much better now I cleaned mine.
IRP is probably stuck if that is the case.
It's a really strange device.
My truck idle's much better now I cleaned mine.
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Hotshot
Joined: Jul 2008
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From: Thomasville, GA
I've been complaining about my search function not working for a while , glad some one posted the old thread . I dismissed the O rings (based on what I remembered ) from the other thread , thought they were new. Seemingly no leaks after second install. BTW , what was the problem with the injectors that were missing & repaired ?
Re-adjusted, installed and both were firing after that. No noticable oil leaking. Truck ran fine and was shut down and restarted 3 times before dying while passing on the highway.
Post Fiend
Joined: Feb 2009
Posts: 8,773
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From: Texas Coast
2X on all that mentioned the IPR stuck open.
If the fuel bowl vent is fouled aerated fuel can also cause issues and lower fuel supply pressure besides the filter and the fuel screen mesh wire. If there is a lot of loose sedimant in the oil the pickup tube can be restricted and the check stuck as well along with the IPR sticking.
If the fuel bowl vent is fouled aerated fuel can also cause issues and lower fuel supply pressure besides the filter and the fuel screen mesh wire. If there is a lot of loose sedimant in the oil the pickup tube can be restricted and the check stuck as well along with the IPR sticking.
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Hotshot
Joined: Jul 2008
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From: Thomasville, GA
Well they still can't find that special tool they need. They've called 3 other dealerships with no luck, waiting to hear from a 4th. They said it's a very expensive tool that is needed to change out the LPOP.
They've had it for 5 days now and no closer to being fixed...
They've had it for 5 days now and no closer to being fixed...
Postmaster
Joined: Sep 2007
Posts: 4,195
Likes: 6
From: Medford Oregon
Well they still can't find that special tool they need. They've called 3 other dealerships with no luck, waiting to hear from a 4th. They said it's a very expensive tool that is needed to change out the LPOP.
They've had it for 5 days now and no closer to being fixed...
They've had it for 5 days now and no closer to being fixed...
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Joined: Sep 2003
Posts: 2,630
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From: North East Ohio
Geezus Pete....
There's nothing fancy to remove the LPOP. They can get a Harmonic Balancer puller at NAPA, A-Zone or Harbor Freight for that matter. See if that's what they are looking for and buy one yoruself and give to them to use.
Wait, if a reputable shop doesn't even have a friggin pulley puller.... Oh nevermind.
Seriously, find out exactly what special tool they are waiting on. Nothing special is needed...
There's nothing fancy to remove the LPOP. They can get a Harmonic Balancer puller at NAPA, A-Zone or Harbor Freight for that matter. See if that's what they are looking for and buy one yoruself and give to them to use.
Wait, if a reputable shop doesn't even have a friggin pulley puller.... Oh nevermind.
Seriously, find out exactly what special tool they are waiting on. Nothing special is needed...
__________________
'96 7.3 F-350 Reg Cab 4x4 - bought new.
'04 6.0 E-350 custom 4x4
'08 6.4 F-550 Reg Cab 6 spd 4x4
'17 6.7 F-250 KR ccsb 4x4
'96 7.3 F-350 Reg Cab 4x4 - bought new.
'04 6.0 E-350 custom 4x4
'08 6.4 F-550 Reg Cab 6 spd 4x4
'17 6.7 F-250 KR ccsb 4x4