Everytime it rains the car will start fine but the idling just goes up and down between 1 and 2 and a half rpms and then if i give it gas theres no power and the rpms drop and it shuts off sometimes. Its strange that it happens becasuse its only when it rains. it doesnt do this any other time but i do have a rough idle problem. does anyone have any ideas on what this could be?