intake...MAYBE..even wheni had the intake on the integra...and intake on the max, i never focus water on that area...sprayed around it lightly, but not full force with it on the intake. like i said, never had problems. i have personally never power washed/pressure washed my engine bay, always a garden hose w/ a end on it.
and yes, keep the engine running. i just follow what the guys do at the ford and chevy dealerships, and ive had no problems what so ever