Fuel Pressure Sensor Faulty?

Encountered a single cell within a datalog that made me wonder if I'm experiencing a fuel pressure issue or simply seeing signs of a sensor on its way out.

Full datalog is attached, but here's the cell in question. Anybody have any thoughts?

 

Ouch, could be PRV going out or spill valve stuck, do the PRV test with hot engine

 

I will try this test again, although from all the testing I've done I haven't seen it drop 800psi in a tenth of a second. Never hurts to test again though!

 

Yeah that's odd more of a @Enki topic when it comes to fueling. Faulty fuel pressure sensor usually trips a code. Wonder if spill valve or internals are binding might be worth opening up that hpfp to inspect and clean. When was the last time you check it out?

 

At this point that fuel pump comes out and gets cleaned every few months lol. I can certainly clean it again, been running E30 all this year.