My trigger points are newly-acquired as they accommodated my rebuilt distributor, but I can always plug in my older trigger points as I salvaged them before I turned in my old core.
Thing is, I had this same problem back a month ago: running on 2 cylinders. Cleaned the grounds & wiggled wires, it ran, ran great for a month. All of a sudden, it runs on 2 again with no voltage to two of the injectors.
Not sure the trigger points would fail like this, but a poor ground or failed electrical component might. The ONLY thing I did between running good at 5:30pm & running on 2 cyl at 6pm was that I cranked it with one spark plug lead not connected (as I planned on checking two plugs but forgot one due to the heat of the day).
With less than ideal grounds, I figure i might have caused a voltage spike that damaged something in the ECU, has it's had two dead cylinders since then.
I did remove the ecu & harness, & clean all contacts thoroughly in the harness & replaced it all, going through the grounds all over again. I hosed the trigger points down with brake cleaner, expecting to see excess lubricant splattered all over the place, but I didn't find such mess.
I'll swap in my other trigger points tomorrow night to see if that does any good...glad I kept my old set.
Mark