Random engine dying and non-starting 1990 Honda Civic?

I have a 1990 Honda Civic with an automatic.
It randomly will shut off while driving.
It also randomly will not start properly, it will turn over and start fine but then die right away.
Both issues are random, sometimes it's fine and will drive for a month no problem, other times I have to stop three times in a mile because it keeps dying. Sometimes after it dies it won't start again before the battery dies and I have to get it jump started.
I have fuel and spark.

Could it be the main relay has a connection that is fractured and randomly connects and disconnects? Or something else?

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