I have a similar problem. After going through all the steps above I get at step
16): 0.22 / 0v between pin 24 and 25 - when IGNITION ON.
17) NO spark
Everything else on the list above is OK; every wire is buzzed out and OK, every sensor and injector ohmed.
I do run a MSD6A system, but this should not affect the original setup. I cannot get a signal to the coil / ecu -> ignition module -> coil. Seems like my ECU is dead? TDC sensor OK, PHASE sensor OK.

I have tried 3 different ign modules, so have ruled it out..

Strange as the ECU worked perfectly before on my old setup. I have swapped chip to a brand new one.. The car has been sitting a while, but earlier when sitting for a while it has been likewise- and after a while of cranking it starts firing (suddenly it wants to work again) and working. Seems like my ECU is a bit fooked? L6 ECU with 4x4 wiring. Switched TPS wires so OK (worked before).

New setup contains of new turbo, injectors, inlet, grp a coil, motorsport leads etc. Sensors are brand new and are OK (tested).

Help?