I first started by scanning truck and noticed ipr was at 85% and ipr psi was at 250-300 psi. So I assumed I had an oil leak or a bad ipr sensor. I pulled intake off this afternoon and found a blown o-ring on the top of the hpop. I also put air psi to the hpop output tube and it help psi for 60 seconds so I am assuming I have no leaks at injectors. My concern is, should I replace the hpop or just replace the o-ring and put it back together? Does this sound normal for a blown o-ring to drop oil psi to 300? The ipr sensor looked visually ok, the screen was intact and free of debris. T.I.A.