sounds roasted, proabably got hot enough to cook the rings and loose their tension, that or the gasket is blown in a few places, id do a compression test. as for op not much of a problem on m20s, switch or wire could be cooked, the wire goes behind the dist cap. when one dumps it's water theirs nothing to conduct the heat to the sensor so no way of knowing on how hot it got, not starting is a bad sign, look at the plugs and see if then have metal deposits on em
all america wants is cold beer warm cat and a place to take a poop with a door on it