No spark, any ideas?

[ItsStockOfficer]

The car, halfway through a pass at the track, stopped running. There is now no spark. I have tried swapping power transistors to no avail, the AFC still reads rpm from the cas, so the cas is not the issue. The idea that BOTH coils broke at the same time is silly...So any ideas?

BTW, the problem seem to occur somewhat gradually as a low rpm misfire.

 

[99gst_racer]

The car, halfway through a pass at the track, stopped running. There is now no spark. I have tried swapping power transistors to no avail, the AFC still reads rpm from the cas, so the cas is not the issue. The idea that BOTH coils broke at the same time is silly...So any ideas?

BTW, the problem seem to occur somewhat gradually as a low rpm misfire.

Maybe it's time for a MSD ignition box?? My first guess would have been the CAS, and then the coil, but your case is a little tough to diagnose. My guess would be the ignition box.