You know.... it is what it is.
The distributor contains an armature and winding arrangement that rotates causing an induced voltage wave. This wave is read by the controller who uses its syncronicty to time the openning and closing of the coil primary circuit.
So if you are lacking spark, you are missing the openning and closing of the coil primary. If the signal is at the controller there isn't much else.
Bosch Master, ASE Master, L1
33 years MB technician