I have a 02 Nissan Sentra SER 67000 miles. Every time it rains whether my car is parked or driving the engine stalls. Actually really noticable when I start the car when it has been parked while it has been raining. It does eventually go away after about 5-10 min of driving. I had it serviced about 2 months ago for this problem and they "R & R IGN Coils/Installed silicone." I had no problems up until 2 weeks ago. Is there another problem that I should be concerned about?