Loosing Spark

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i have a 99 Plymouth Breeze 2.0L, it died while I was driving it in a parking lot. It lost spark due to the automatic shutdown circuit tripping. the camshaft and crankshaft sensors are good, the timing belt is good, the coil pack is good, and the relay is good. I hooked up a scanner to see if there were any codes stored, but nothing. Am I missing something, I went through the Haynes Manual about 10 times now, and still can't figure it out. What else could be causing the ASD circuit to trip and kill spark?