ICP pressure ? - Ford Powerstroke Diesel Forum
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post #1 of 6 Old 03-30-2013, 12:02 AM Thread Starter
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ICP pressure ?

What should my ICP psi be at a warm engine idle? I had a no hot start problem but did the updated STC fitting, stand pipes and dummy plugs and all 4 passenger side injector o-rings because one was really bad. I didn't do the other side because I already had it back together. Now it starts when hot but it cranks over longer than normal. My ICP when hot reads 580. Should I be OK or should I tear down the drivers side again and do the rest of the o-rings?
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post #2 of 6 Old 03-30-2013, 06:23 AM
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you need to run the engine hard to purge all of the air out of the high pressure oil system. 5 or 6 good hard wot runs should be enough, either that or 15-20 miles of normal driving.

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post #3 of 6 Old 03-30-2013, 09:27 AM
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your ICP looks right for a hot engine. What is more telling is IPR. I am thinking the IPR should be at 20% or so when idling. It the IPR is at 60% when idling to hold the ICP up, that means you have a problem.

Go look for a post where someone lists the IPR% and ICP at various temps.


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post #4 of 6 Old 03-30-2013, 10:22 AM Thread Starter
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Ok thanks guys I appreciate it
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post #5 of 6 Old 03-30-2013, 10:27 AM
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IPR typically will be less than 30, mine is 28, and ICP 650 +-50 on a healthy HPO system.

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post #6 of 6 Old 03-30-2013, 06:01 PM Thread Starter
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How do I figure out what my IPR is? I just got the full color and touch screen edge monitor but can't find anything on the IPR on it. How are you guys getting a percentage?
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