my 2.6v6 b4 has developed a problem in the past couple of days i'mm try to explain as best i can.

the car was starting and runnin perfect until a couple of days ago when it was left outside with the hood up and there was a very very heavy shower of rain about an hour had passed since the rain stopped and i went out and attempted to start her up...heres where the problem starts, ignition on and crank the engine over it feels like the battery is dead on first try but the more you crank the engine over the faster the starter motor turns and it starts eventually after about 30 seconds of cranking, once started it ticks over at 1750 rpm then drops suddenly to 1250 then back up to 1750 on it's own , this continues even when it's up to temp and the fan kicks in.....any ideas ????