Help Please. Hpop or IPR? - Ford Powerstroke Diesel Forum
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Old 03-10-2010, 10:54 AM
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Help Please. Hpop or IPR?

How can I test the hpop to see if it is up to psi. I have a no start problem on a 03 6.0 the Ipc comes up to about 280psi and the IPR is at 85%. I dont know where to go past this to test it? Thanks
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Old 03-10-2010, 10:59 AM
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See the no-start link in my signature for the diagnostic procedure by m-chan68. You will need an AE scan tool (or equivalent) to diagnose your problems (which I assume you already have, since you can read ICP and IPR data).

Your next step is so connect shop air to your ICP port and command the IPR valve closed and listen for the air leak. If no air leaks, then you have a weak HPOP. If you hear an air leak, then you've found the source of your high pressure oil leak.
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Old 03-10-2010, 11:13 AM
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Originally Posted by VeeDubTDI View Post
See the no-start link in my signature for the diagnostic procedure by m-chan68. You will need an AE scan tool (or equivalent) to diagnose your problems (which I assume you already have, since you can read ICP and IPR data).

Your next step is so connect shop air to your ICP port and command the IPR valve closed and listen for the air leak. If no air leaks, then you have a weak HPOP. If you hear an air leak, then you've found the source of your high pressure oil leak.
Yes, your link is what got me this far very helpful. Does the shop air connect to the IPC port and where can i get, make this connection to it? thanks again.
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Old 03-10-2010, 11:18 AM
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The IPC on a 2003 is more difficult to get to it's on the back of the engine under the turbo. The easiest way to get to it is to go under the truck, remove a heat shield then you can remove the IPC. I have no idea if there's an easier way on the 2003's to apply the shop air.
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Old 03-10-2010, 11:27 AM
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Originally Posted by nylyon View Post
The IPC on a 2003 is more difficult to get to it's on the back of the engine under the turbo. The easiest way to get to it is to go under the truck, remove a heat shield then you can remove the IPC. I have no idea if there's an easier way on the 2003's to apply the shop air.
Thanks, I can get to the icp, I replaced it about a year ago. What a job that was. I was just wonding about the fitting it is a bit of a diffrent thered?
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Old 03-10-2010, 06:02 PM
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From what I've heard it's a weird thread size... you'll have to rig something up.
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Old 03-10-2010, 06:21 PM
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For what it's worth, on any 2003 6.0L that has darkened my doorstep with insufficient ICP, it's pretty much always been the high pressure oil pump itself that has been the culprit component that failed. 2003 model years are a ROYAL pain in the A** to air test. You would need to remove the easiest to access valve cover (which is probably the driver's side) and air test it through the port on the top of the straight oil rail. If you choose to disassemble it as far as removing the high pressure oil pump, you can also insert a rubber tipped air nozzle directly into the branch tube. By doing it this way, you eliminate the high pressure oil pump, discharge tube and IPR valve out of the equation. If applying air into the branch tube directly fails to reveal any air leaks, you'll know it's the high pressure oil pump that has failed, which you've already removed. If you do hear any air leaks, you'll know if you're going LEFT or RIGHT.
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