Recently had an injector fault
Got a misfire during a weekend away
Fairly quickly located the moss using water on headers method, and established not a spark problem.
Without a multimeter couldn't tell for sure but guessed at bad injector and sure enough it was, swapped injector wiring around and still same so I had to guess in the field.
I got a few spare when I got home and now carry spares in the car.
It had died completely, no continuity through it, and it was simply there one minute and next or stopped working.