Short version got water in the engine because of our new gas mix. Diagnosed and cured that problem by installing a really good water filter in the fuel line. Motor seems great reaches to a max speed of about what it always has been.

PROBLEM: the "check engine" beeper goes off for a while but the light stays on.
Otherwise everything seems fine. My question is should I try (assuming there is a way to) reset the alarm on the assuption that the alarm went off in the first place because water was in the fuel and obstructing the function of the injectors.