how high a pressure pressure washer did you use? Was it high enough that you could have cut or broken wires? If you sprayed at an angle check down in the valleys to see if the spark plug tubes are filled with water.
There are lots of mechanics on this forum... you just did a likely minor FUBAR where it could be any of a zillion things. Anything we suggest here is going to be a wild @$$ guess based on something we can't see. This is the type of problem where we need knowledgeable eyes on the subject.any mechanics on this board?...helllllp
WD40? Bad idea. It eats certain plastics for lunch, some right now, and some a year from now.