Originally Posted by
ford7.3l
The oil is good I run Rotella 15-40 and change it every 3 thousand miles. My Fuel pressure is good too, it reads nearly 85psi at idle and about 60 -65 when I punch it. I have no oil leak on the high pressure oil pump. So does that leave to replace the IPR?
If you have access to a scan tool, i.e. Auto Enginuity, I would monitor ICP pressure and ICP Duty Cycle % at various rpms and loads. This would give an indication as to whether the IPR may be sticking. A bad ICP sensor could also be giving a faulty reading. Check for oil in the ICP connector.