no spark

[turbo90]

As the title implies, I have no spark. So far I have replaced the coil, distributor, ECU, and power transistor. All have had no effect on the condition. My injectors are firing, as I can smell gas at the tailpipe. The coil has +12V at its positive terminal. I have pulled every fuse in the engine bay, all are good. I am going to check the wire that runs from the ECU to the transistor for continuity, but I don't think that is the problem. The only part I have not replaced is the resistor/condensor, but the resistor tests ok, and the condensor is just a capacitor wired to ground to filter noise. Anyone have any other ideas?

Thanks, TB