In the even I was carjacked, I am thinking about installing a timer switch haven't figured that part out yet) but if I connect one side of the switch to the negative side of the coil and the other side to a ground, it should kill the engine I believe, question would this actually kill the engine and if so would it do any damage killing this engine in this manner. It would give me enough time to get away, but kill the car after a short time period , maybe 15 seconds. I might look at a switch that has a pin with a small wire I would pull with my pinky as I unfasten my seatbelt. Thanks for any input/ideas.