2 months ago the dealer replaced the crank position sensor after the car ran extremely rough and the check engine light came on. A few days ago , after a good rain storm , the car ran rough upon start -up....it had sat for 3-4 days. after drving it for 10-15 mins. and leeting it sit for about 1 hour, it sarted fine and ran smoothly......is moisture causing the problem or is another engine system or part malfunctioning ?