When in traffic or parked the engine idle will drop to the point that it feels like it will quit and then the engine picks back up. It has around 120000 miles on it and I was wondering if the coil packs could be the problem. My wife said that the CHECK ENGINE light came on the other day and I am going to have the code checked, but I was wondering if there was a particular cause without the check. Also, the factory radio quit working the other day as well. I checked the fuse and it was OK. The wife said that the radio started making static noise and then no sound and the display showed "CALL". Please Help! THANKS