Not sure a bad Floscan would create a low fuel pressure symptom. I had a low fuel pressure problem some time ago and, in my case, it was a bad fuel pressure sensor.
You might check the fuel hose between the spider on top of the engine to the fuel pressure sensor. I seem to remember reading that line can mess up fuel pressure readings if it's not purged regularly (should be done as part of the Condition Inspection).
None of that explains the zero fuel flow though. As far as I know, assuming the engine is still running, that has to be the Floscan.
Port Orange, Fl
RV-12 N121TK ELSA #120845; first flight 06/10/2015
RV-12 N918EN ELSA #120995 Eagles Nest Project; first flight 05/18/2019
SPA Panther N26TK in progress