If your throttle body lines are the wrong way round 2 vac 2 water forget it mate you will need a rebuild I know this as it happened to me a while back put 2 the wrong way round, water straight into the cylinders, also a bent rod, to cut the story short I stripped the whole lot and started again, right down to even honing the bores, to new gaskets rings etc, if I was you though to be sure take leads off take plugs out and crank over and wait for water to spray out the spark plug holes if that's the case