lajeunesserick

only when it rains or high moisture out side the car stutters and check enginlight comes on. we had the code read and it came up PO301 and PO303 and it says cylinder 1 and 3 misfire has any one heard of this . any suggestions?????? The car will stutter for a few min then i will use the auto shift and it will start to drive fine but the check engin light says on for days sometimes. but the car drives fine when no rain present?