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post #1 of 27 Old 08-10-2012, 12:30 PM Thread Starter
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Really puzzled....

Okay so I just got done replacing my stand pipe and dummy plugs to try and fix my no start when hot issue and after looking at the old ones it looked very promising, now it still didn't fix it so I had my truck tested and it shows it has 450psi when I try and starts and I have read that the STC is normally at 50 psi when it's bad so wtf?? Oil cap/filter leaking all this pressure?

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post #2 of 27 Old 08-10-2012, 01:49 PM Thread Starter
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Just replaced the oil filter and oil and nothing

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post #3 of 27 Old 08-10-2012, 02:05 PM
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Did you replace your stc fitting? If your under 500psi the ficm won't fire the injectors. When I did mine I had to replace both dummy plugs both stand pipes my stc fitting my ipr valve my HPOP my oil fill tube o rings my turbo drain tube and ccv o rings. Then I never had a problem with it since.

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post #4 of 27 Old 08-10-2012, 02:06 PM
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Need over 500 psi on the ICP to start. Can you read IPR per chance?
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post #5 of 27 Old 08-10-2012, 02:06 PM
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Lol beat ya Sean.

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post #6 of 27 Old 08-10-2012, 02:34 PM
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It coulod be that your ICP is bad. To check, just unplug the ICP (on valve cover) and try to start it. The ECM will assume a value of 1500psi (ibelieve, don't quote me) and it should start. If not, then you are actually not getting enough HPOP.

Next, I would pull the IPR and check the screen. If that is really dirty (can happen when you replacce oil cooler or do anything in the HPOP system), then it will prevent you from getting ICP and the truck won't start. If clogged, replace the screen. If the screen is torn, replace the IPR as well.

If those don't work, you likely have a High pressure oil leak somewhere in the lines. That can be harder to find, and you may have to pressurize the HPOP system to find it.

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Compounds FTW!!!
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post #7 of 27 Old 08-10-2012, 02:47 PM
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Adam I agree with all but one thing if the ipr screen has holes in it he needs to replac the hpop. Any sediment that makes to the hpop will trash it. Maybe not immediately but soon after.

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post #8 of 27 Old 08-10-2012, 02:51 PM
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Adam I agree with all but one thing if the ipr screen has holes in it he needs to replac the hpop. Any sediment that makes to the hpop will trash it. Maybe not immediately but soon after.
I believe you are thinking of the HPOP screen which is under the oil cooler. The IPR screen is between the HPOP and the IPR. It is finer mesh than the HPOP screen and the sediment that is on it will have already traveled though the HPO to get there but it shouldn't be large enough to damage the HPOP. I agree that if the HPOP screen is torn that the HPOP should be replaced.

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post #9 of 27 Old 08-10-2012, 02:56 PM
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No I'm talking about the ipr valve screen if it's bad and has holes through I than you should replace both the hpop and the ipr valve as sediment has already traveled through both and will trash them.

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post #10 of 27 Old 08-10-2012, 03:00 PM
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No I'm talking about the ipr valve screen if it's bad and has holes through I than you should replace both the hpop and the ipr valve as sediment has already traveled through both and will trash them.

My ipr screen had a 1/8hole in it... replaced it and kept the hpop...

6 months no problems.



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