I’m in a similar boat and from the other posts I’ve recently found with similar issues, resolved. I think I’m going to say jt sounds like it’s the fuel pressure regulator that needs a really good cleaning or replacing. Basically what I’ve read is that if you’re fuel filter was bad the HP filter will probably be the same if not worse. I’m traveling for the next month come Tuesday but if I have time before I go I’m going to give mine a cleaning to find out. Hopefully I can give you an answer in a few days or about a month when I return lol but hopefully u will have jt solved sooner than later! Good luck!!