1987 Buick Century does not start?

Thomas

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We have checked to see if the car was producing a spark at the spark plug, which it was not doing, So we Removed the ignition module and had it tested at the auto parts store and the module tested O.K, So we replaced the (3) coil packs that mount on top of the module, then reinstalled the assembly, only the have the car do the same thing.. The car turns over-fine but is not producing a spark at the spark plug..We tested the fuel pump and it works, we checked the Park/Neutral safety switch and it's good.. The car has a distributor-less ignition system. I am wondering if the Crankshaft position sensor is bad.. But I do not think that it would cause the car not to Produce a "Spark" at the spark plug.. Does anybody have any input?
 
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