So I'm having to crank 10-15 seconds to get my truck to start after doing all the updates and studs. It ran fine before so I'm a little confused. 2005 f250, HPOP stc update, new standpipes and dummy plugs, new oil cooler,egr delete, new orings on oil rail cups, new IPR screen( old one was good no metal), new turbo feed line, blue fuel spring. Motorcraft oil filter and cap. I pulled the icp and plugged in an air line and no noticeable leaks or air back into the filter housing. It seems to be a low oil pressure when cranking issue. I plumbed in a gauge to the icp port to watch it. It shows little or no pressure at the start of cranking, after 10-15 seconds it jumps to 700-800 psi and fires, runs fine, has around 900 psi at idle, at about 1600 rpm it will have close to 2000 psi, so it seems like the HPOP is still working ok. FICM is at 48-48.5v, I pulled the IPR again and it looks ok just a few specs of dirt from assembly but no tears and no blockage. I don't have a way to check IPR duty cycle on my CTS so I'm down to replacing the IPR unless anyone has a better solution?