Engine Cutting Out! What to check?

OldmanRick said

Could you be in the early stages of a coil failure. With 15to1 comp. any weakness would show up pretty quick. This came to mind as you opened the plug gap some and it seems to have gotten worse. Careful not to run too hard on just the primaries as you'll be lean under power no matter what jet you run :smile:.

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I actually closed the spark plug gap so it shouldn't have done anything but made a little better spark.

Oh yeah, I guess I should have noted that I am running a 140 GPH Aeromotive electric fuel pump with bypass regulator. Fuel pump pressure never moves under acceleration and stays right at 8 psi. I had accidentally touched the hot side of the coil wire with a socket while it was running and it caused a spark to pop. I was told that would not have done anything, but I'm not so sure. I sure think it's got to be a spark problem.

So just to be clear (and I'm still learning), If I run just primaries, the air/fuel mixture has a certain air/fuel ratio. If I open the secondaries, these will have the same air/fuel ratio if the jets are the same as the primaries, no? The only difference being twice the air and twice the fuel, but same ratio. So how would that run lean if I were just on primaries if the air/fuel ratio is the same whether I'm running primaries or secondaries?