Truck Repair: ford 7.3 diesel, scantool, wraping

Question
Hey  Mike,
Thanks for the quick response. We're checking the harness, a short is along the same lines, I was thinking. But why the IPR and not the ICP? I would think with it going that far out of range, and being heat related that it would be the sensor, rather than the controller. Plus can it actually spike to the extreme of the sensor's capacity to read?
Just some more thoughts, not up on diesels, so I'm not sure if what I'm thinking is even close to correct.
Thanks again,
Hilton
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Followup To
Question -
Hey Mike,
Been trying to troubleshoot my Dad's 95 F250 w/7.3L diesel. It's runs fine until he hooks his 30ft camper behind it. After running at highway speed 50+, for about 1 hr, it will cut off and then restart a few seconds later, or if he was stopping, by putting it in neutral, and restarting. This would get more frequent the longer he kept running.
Using Snap-On scantool, it has a stored memory codes P1282 - Excessive ICP, and P1211 - ICP pressure above/below range.
I took a movie of it and when the problem occurred, the ICP jumped from 800-2400 psi to 3400 psi at 4.88v. Also the IPR went from 12-30% to 5%.
Thanks for your help,
Hilton
Answer -
Good work on the diag.......  By that info I say it needs a new IPR.  A couple things to check first are the oil level and quality.  If they are good; then look at the wire harness around the fuel filter.  There is a vacumme sensor (black) on the drivers side of the filter that ALWAYS go bad.  If this sensor is bad it will leak fuel into the wire harness for the IPR and give bad codes.  Pull the wraping off the wire harness and if they are melted together and covered in fuel replace the harness and that vacumme sensor first before doing the IPR.

Answer
you are correct it could be the sensor. BUT 90% of the time the IPR goes bad and not the sensor.  In the last year I have replaced 1 sensor (it was leaking oil like crazy and still read correct) and about 20 regulators.  Your thinking is correct and a good possibility.  I got my 444E diag sheet and the international code that matches with your P1282 is a 331 {injection control pressure above working range)  This is sapposed to set at 3675 psi + .  The only causes they list are a grounded IPR or a stuck IPR.  Hope this helps.