IPR, injection pressure regulator, please help - Ford Powerstroke Diesel Forum
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Old 03-10-2009, 07:52 PM
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IPR, injection pressure regulator, please help

what are the symptoms of this failing?

my trucks idle is fluctuating, and it's starting to buck a little under acceleration.
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Old 03-10-2009, 07:55 PM
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Straight from dieselmann's site:

No/hard start hot or after stalling, usually re-starts after cool-down; Jerky, irratic idle; Possible DTC#'s P1211, P1212, P1283:
Usually caused by low injection oil pressure or regulator (IPR) valve. High pressure oil is used to pressurize and inject the fuel into the cylinders--each injector is essentially its own injection pump. The IPR is a by-pass valve that controls the high oil pressure depending on demand.
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Old 03-10-2009, 07:57 PM
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ok, would those symptoms point to ICP, IPR, or IDM?
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Old 03-10-2009, 07:59 PM
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IPR.........dang 10 letter limit.
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Old 03-10-2009, 08:04 PM
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good, i got a spare coming tomorrow. we'll see what it does
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Old 03-10-2009, 08:05 PM
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Don't count out that it could be the CPS. Unless you changed it recently.
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Old 03-10-2009, 08:07 PM
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i had it changed under the recall last summer
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Old 04-29-2009, 04:45 PM
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Any updates to this ???
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Old 05-01-2009, 06:53 PM
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i swapped in a salvaged pressure sensor and it fixed it
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