he said it was reading 100% or something i guess and he said if he had the truck in his shop that would be the first thing he would check. he said this to my dad "tomorrow when you get it running it will run like piss" so judging by that sentence hes pretty sure were on the right track and that it will run tomorrow after that ipr is changed out. he was an older guy like 70s but he knew his stuff i heard him over speaker one day and he gets what hes saying so im confident that him saying ipr will get it. which makes sense to me. will keep updated and will post what ever happens tomorrow.I wonder how the mechanic could tell that the valve is stuck open? I understand that the command to close the IPR makes no difference, but that could mean that a large leak exists at the HPOP. There is no feedback as to the actual position.
Well anyway, removing the IPR and bench testing it can answer that question. Keep us informed.