Don't spray any water in the engine bay b/c of ALL the sensors on these engines. They're so sensitive to begin with. In the old days, before everyone was concerned about the enviroment and before all the sensors, we used to steam clean the engines. But that is now illegal in Ct., I think it's still legal in Ma. I don't recommend it but If
you decide to go that route, make sure all the electronics are wrapped up nice and tight.