Hello, my name is Lori, my mother has a 2003 thunderbird, my father is very concerned. My mother was driving down the road and it just slowed down to 10 to 20 miles an hour, then it happened again, my father took to to the dealer and it was still under warranty and they said it was something to do with bad coils, replaced it or them and a few weeks late it did it again, dealer said they would fix them but my father is very concerned about the cause of this issue. He is afraid that my mother will be driving and go to turn left in traffic and the car will die again and she could be hurt, he cannot get any answers from the dealer as to why this is happening and if it is going to happen again, any information or articles that I can print out for him would be greatly appreciated, thank you so much, Lori