Not to be an alarmist, but, I had the motor apart this past winter and the fuel lines were disconnected at the fuel rail. I had sealed them off so they wouldn't drip, but they did. In the process of trying to seal the two open lines, I noticed some "gook" in the feed line. Turns out the line was rusted internally. To make a long story short, it took months to get a new line and almost all the lines are no longer made by GM. In the process, I met several people on the internet trying to deal with internally rusted fuel lines. Make sure you get the water out and correct this problem. In the meantime, until you figure it out, I would get a cover of something for the car. The fuel line issue is something that I think will haunt all of us C4 owners in due time. Also, the injector internal parts are carbon steel and easily corrode. I replaced them with a set of injectors that have stainless steel internals so I don't have to worry about that anymore.