I just bought a 1995 456 GT and need some assistence in how the ECU triggers the coil packs. The car has developed a missfire (actually no spark at all on cylinders 2 and 5). It was happening when it was cold and then it would go away. Today it continued even once the car was warm. There is no spark for those cylinders directly from the coil pack so I've eliminated any plug wire issues. The system never shows a check engine light but will show a slow down 1-6 light if the car is run for 5 miles or so at 35-45 mph. First, does the car have an ECU for each bank of cylinders? I can only find 1 under the drivers side kick panel. Second, does the ECU drive the 12V trigger to the coil pack or are there separate ignition amps. Third, has anyone heard of a coil pack failure that only effected 2 cylinders? Thanks for any insight you can give.