Nice timing, I just experienced similar issues today when having a roadtrip.
Started with engine cutting out upon larger vibrations (running over groves in pavement.) but then picking up an working as perfect as usual.
After a while it started to cut randomly, under load without load, just idling.
First assumed it was the knocksensor picking up on knock when running over bumps due to running very stiff shocks, and having the sensor changed recently. So tried disconnecting it completely and resetting ECU.
No solution there so I guess this rules out the knocksensor raising havoc.
I am not getting any faultcode as it seems ECU looses power as well when this is happens. I assume this due to the fact that the engine CEL is lit but then goes out when revs drop? Which makes troubleshooting a PITA...
(I ofcourse get the Knocksensor code when having it disconnected.)
So I am guessing this is some sort of electrical issue.
I made a short vid where you can see what happens, you can also see the CEL being lit and then turning off when revs hit 0.
I ended up stumbling home running under 3k rpm, still having drops in revs at times, but not stalling..
Will start with checking up on Cranksensor and vacuum hoses to the FPR during this week. If anyone have further tips or seen similar problems please advice on how to move forward.
Sorry for possible thread steal but this is where i ended up when doing a search so thought i guess others will as well. Please update if you get your issue sorted!