I had sent you a private message, but in case you did not see it, look at the spark plug wire. I do not think the 2012 models had the floor pan in the area of the engine, so water could be splashing up on the wire, causing the intermittent problem. You can probably duplicate the problem by squirting some water on this wire and see what the results are.
This is before EFI, so I do not see any other electrical problem.
Hope this helps.
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Pennsylvania, for 60+ years, most recently, Allentown, now TV. 
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