Basic HPOP Regulator questions

[alpinhi]

Hey guys sorry for the new guy question but can you tell me where the HPOP regulator is located and how difficult it is to change out. A little back ground of the issue. The truck is a 1996, 179k CC, SB, Auto, all stock except for a Tymar intake. The truck has been running very unreliably for the last 2 years. You never when its going to start or when its not. I can start it up let run, shut it off, and ten minutes later it just cranks. I have also noticed that its not idling quite right, not enough that someone else would notice but I do, almost like a slight miss. Its not enough to really see it on the tac. During a hunting trip last year I had a severe loss of power and a CEL came on. I had the code pulled and it was for the HPOP regulator. After doing some online research it sounds like this maybe the culprit. I saw on here that it can be cleaned or should I just replace it? The dealership here has one in stock & wants $265 for it.
Thanks in advance

[OL' OutLaw]

I'd sure try cleaning it first.....stick your head over the top of the front of the engine, and look straight down....the little tin nut on the stob sticking out on the right front, down there under all those hoses and crap, is the nut that holds the solenoid on to the regulator....remove that nut, (3/4"), the solenoid will slide right off (disconnect wire plug) then take the appropriate size deep socket and break the IPR, (Injector Pressure Regulator) loose from the HPOP.....it has an o-ring to seal it to the body......unscrew and remove, (you will lose about a quart of oil)....clean it off-out good and re-install (with NEW o-ring) then pull the oil pressure sender out of the top of the reservoir and re-fill it with fresh oil (it's on the left side, with a wire plugged into the top)

I'd also remove and clean the FPR (fuel pressure regulator) on the side of the fuel filter, under brass plug ....take it out, there's a screen under it, clean, re-install....if those two things don't help, holler back....

[alpinhi]

Thanks that info helps, turns out I was looking in the wrong spot. Do you unhook and move the hoses out of the way or just snake a wrench down into there?

[OL' OutLaw]

yes....you just about have to move the damn fuel filter housing outta the way - towards the back to get it out....( main reason I converted to e-fuel )....you will want new o-rings to re-insall it with too....
get them here :

http://www.dieselorings.com/index.php?page=details&prod=162&cat=10&group=5

[alpinhi]

Ordered, Thanks! Ill let you know what happens.
Really appreciate the help!
Travis

[alpinhi]

New o ring kit came today & I got the IPR out. Should I disassemble the IPR to clean it? It looks like it unscrews, the o rings on it right now appear to be pretty hard and one has a slight crack. I thought that I read on here that IPR should have a screen on it, this one does not. I hope it didnt come off in the HPOP! I got the FPR out and cleaned also, it was completely clogged.

[Patrick Feeley]

The early IPR's had the edge filter and the end of the IPR will look solid. The later ones did not have the edge filter and the end looks like a gun barrel. There is no "screen on any of them to come off (so no worries there). Cheers!

[alpinhi]

Thanks a relief, I got it apart and cleaned up. O rings didn't seem to be in bad shape and found no debris..

Sent from my phone, please excuse typos