Basic Engine Questions, Firing Order and Water Out the Tailpipe Options

[Highland]

Wondering what the firing order isn't 1-4-2-3 instead of the actual 1-4-3-2. Wouldn't it make more sense to go back and forth between opposing sides? Would the engine sound smoother with 1-4-2-3?

I happen to be by my tailpipe when my engine transitioned from cold idle (~1800 rpm) to warm idle (~1000 rpm). When the rpm dropped water sputtered out the tail pipe and continued compared to dry exhaust while cold idle. I know water is a product of combustion, but does this tell me anything about running to rich or lean at these idle conditions?

[technicalninja]

Between the difference in 4-cylinder numbering sequence and the different firing orders the engines USUALLY ran 1-4-3-2.

This is ALMOST all 4 cylinders.

Honda was an exception.

OLD Honda's ran 1-3-4-2.

New Hondas run 1-4-3-2.

Trying to alter firing order is "fully designing" the engine.

Not worth doing in my book...