Do you have power at:
The ECU memory wire (white?)
ECU ignition power wires (black/red)
The coil/ignitor power (black orange) (I'd think so if it's sparking)
The injector power wire.
Do the fuel injectors pulse when cranking?
Has someone played with the distributor wiring? The colours should not match on either sides of the plug.
Get an oscilloscope and check the output of the cas. A multimeter set to frequency function will also be able to tell you if there is an output or not.
Start there.