I have a problem with my Truck, every time it see's water it starts to break down

I've narrowed it down to the Injectors(i Think), because when i blead the Cooling system the ONLY part of the eletrical system that got wet was number 1-2 Injectors.
Will water on an Injector cause it to run rough?, after a while it does go away, so i was thinking it's water and it's drying out.
If i'm on the right track, any one got an idea on how to seal them up?
It's an RB30et out of a VL
Thank's
Chris