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I had a billet cap from sinister and a bypass filter but I pulled it and went back to stock when I had issues. I'm thinking it may be the LPOP starving the HPOP.

I air tested last night and found no leaks through the IPC sensor port and the IPR commanded to 100% (or 85% -closed-)

IPR runs between 14% and 84%. Haven't checked the actual low pressure. When I unplug the IPC sensor it runs rougher. Pressure increases smoothly when the sensor is plugged in. I actually tried a new one and got no difference. I also change the IPC sensore pigtail. I tried a new IPR and...

Good afternoon All, I have search all over and cannot find a thread with a similar issue. I have a 2005 Ford Excursion with the 6.0L. Tore it down and did some bulletproofing. All went back together great. Ran great for about a month. Now I am only getting 1500 psi from the HPOP. Starts...