PJ - First - Suck, Squeeze, Bang, Blow still describes our Opel engines and F1 engines the same.Our cars are not F1 or racing cars. AFR is very useful device but I like to keep it simple. I am mechanical engineer but in my heart I am old school shade-tree mechanic, so I relay on the seat of pants and colour of spark plugs. It works fine and the car goes great. Sorry for a digression.
Shade-tree tricks are good and useful but can require a lot more 'nuance' in my experience. AFR is a bit easier to write a decision tree for in diagnosis. The neat thing about AFR is that when you start pairing it to other symptoms, it begins to make immediate diagnosis of problems much easier.
This is why I suggest a data logger. You can just drive around and do your darnedest to create the problem and then analyze the myriad of data traces afterwards. Comparing afterwards can help you discover correlations which were not apparent immediately while you were driving. IMO, every engine needs a logger that keeps track of RPM, throttle position and AFR. Then you can add in spark advance and manifold pressure. Then various temperatures. etc.Please keep in mind:
C) This problem usually lasts only a few seconds, there ain't much time to look at all your gauges while you're driving 80mph in the passing lane in heavy traffic and your engine shuts off
I apologize for my barely hidden anger at someone suggesting that I install yet another gauge that doesn't fix a dang thing and only MIGHT tell me that I have a problem in my fuel or ignition system.