IPR question?? - Ford Powerstroke Diesel Forum
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post #1 of 2 Old 08-31-2013, 07:59 AM Thread Starter
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IPR question??

Maybe one of you guys can tell me what the piston in the magnet stem does.
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post #2 of 2 Old 08-31-2013, 10:20 AM
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It regulates the "bleed-off" to control the injection pressure. The HPOP produces much more pressure than is, necessarily, needed depending on conditions. So the IPR leaks the extra (as controlled by that magnetic coil) to lower the pressure. The more its Closed, as represented by a percentage of time, the harder time it's having maintaining the desired pressure.
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