can the ipr show good readings yet still have a stuck spool? I have good BW and 2250 psi at the pump with the icp unhooked but only 30 psi at the heads. Did an pressure test at the head for leaking o rings no leaks there? I'm thinking the ipr is stuck open and draining backbto sump but still showing good numbers,

 

The pressure you are seeing for ICP is just a default pressure the PCM displays when the sensor is unplugged. You are not making that pressure in reality. What do you see if the ICP sensor is plugged in?

 

I'm getting 30-40 psi with the icp plugged in, my computer has 2 injection control pressure readings, when the icp is plugged in they both read 30-40 psi when it is unplugged one reads zero(I'm guessing that's the reading at the icp) and the other reads 2250. Is there another sensor it's getting a pressure reading from? The Ipr?

 

As far as I know there is only one ICP sensor, as for the IPR, it is a valve so it doesn't (as far as I know anyway) read the pressure itself, it just opens and closes to maintain the necessary oil pressure. It's usually shown as a percentage of duty cycle.

And btw what is the BW you are referring to?

 

I meant PW pulse width .6 ms, the duty cycle is good also, when it's reading the low pressure it's at 65% and when the pcm is showing 2250 psi the duty cycle is at 30 ish %

 

The 2250 is fake, ignore that. The only reason we unplug the ICP sensor is to get a truck to start in the event of a bad ICP sensor - this is not the case. If you tried to repair the IPR, the most common cause for a no-start after re-install is the tiny needle valve is in backwards. If that's not the case, you can first check the voltage at the IPR, and if that's good... you can try a new IPR before you move on to the HPOP.

 

OP, it is always helpful to stay on the same thread so repeat questions are not asked. Here is your original thread a few days ago for those wanting to review ...

https://www.ford-trucks.com/forums/1...ated-info.html

Yes, I asked OP to unplug the ICP because I wanted to see what inferred values were reported with it unplugged. The reason for this was ICP reporting only 30+ PSI however the IPR% was only 14%, not ramping up. Maybe with that low of ICP pressure that is all the PCM will request, don't know.

OP, you indicated you just replaced the HPOP. Was that for the same reason or some other issue? Sure seems like it just isn't pumping, that or the IPR is bad. Was the IPR replaced also along with the new pump?

I've not had the privileged replacing the HPOP (yet) so I'm not going to give any pretend help in that area, only know what I've read. Lots of members on here should be able to give you some tips on what to look for and move you forward to a solution.

 

my apologies I replaced the hpop because I went to reseal the stock one with new o rings, when I went to remove the plug above the ipr, not the non serviceable, it brought all the threads with it. I used my old ipr since the truck was running prior to the repair, I've since tried a few things, my computer is showing ipr duty cycle is at 65% while cranking. I guess what I'm getting at is can the numbers show a good ipr, yet the mechanicals internally are bad or stuck? Would a stuck ipr not allow the pump to build any pressure?

 

I have checked voltage I have 11.8-12.1. I haven't repaired the ipr. I apologize once again for the double thread, it's been a long weekend working nights 16 hours and trying to get my truck up and going is starting to take its toll, I let her sit today and caught up on some sleep

 

So have you checked and verified the gears on the HPOP are lined up and are actually turning the pump?

 

I have, torqued to 96 ft/lbs, had the 2 bolt cover off and watched with a mirror as some one cranked gears meshed and turning and pump is also turning. That was my first thought that it was on crooked. I even pulled the gear off and inspected for signs of spinning in the pump, everything on that end is good

 

Thanks for all the input and help all, ive been in contact with Diesel Site technical support and I'm going to send the pump back with my gear and bolt. They're going to check the pump out and mount the gear up and see if they find something that I'm missing. I appreciate all the knowledge I'm getting from everyone on FTE it's really helped me over the past few weeks and you guys have also taught me a thing or two, always a great thing to learn some new tips, tricks, and knowledge, especially when I plan on keeping my truck for as long as I can get in the thing lol. Greatly appreciated once again have a great night y'all!

 

You followed a logical path of troubleshooting--if the vendor says the pump is ok, then here are a couple of thoughts;

Dirt got into the IPR when replacing the pump.

An o-ring leak that only shows up when high pressure oil is present. It is hard to exactly duplicate oil leaks with (relatively) low pressure air. Most of the time though, shop air is adequate to find oil leaks.

Did you check your oil reservoir for how high the oil was?
Larry

 

Larry, I checked the reservoir, oil level is good. I would think ipr was dirty if I didn't try 3 ipr (the original, a "known" good one, and a brand new one that I didn't take the condom off of until I was ready to install) all three had almost identical numbers. I've been in contact with Bob at Diesel Site over the past couple weeks, he's been helping me as much as he can, we have both come to the conclusion of sending the pump back and letting him tear into it. As for the high pressure oil leak, I checked for one like you said with air (sure not a lot of pressure), I would lean more towards a leak in the oil rails, or injector o-ring if the truck wasn't running or running like crap before the repair. The engine was running just fine just had a blown out O-ring on one of the plugs on the pump, when I pulled the plug it pulled all the threads with it. When I isolated both heads and put pressure to the oil rails it held 90(ish) psi for a solid 4 minuets. I'm very greatfull for all the input and knowledge I've soaked up from everyone on here, it just seems like this is one of those "never had this one before, keep me updated" problems lol. I'm really hoping when they tear into the pump, they find a "welp there's the problem" problem and it's an easy fix. I've been down every avenue on this bad boy and I'm starting to think the Power Stroke gods are just doing this for a laugh😂😂😂