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i`m solder wires to ecu board and conect it to coils. and now problem solved. i`m think bad wires cant keep current on load.

i`m have troubles with honda cbr 1000 hurricane. it`s carb with electonic ignition. no spark. i`m check ecu board, npn transistors. all good.
ignition coils cant pass second test. some qestion:
secondary coil have medium point connected to one point on primary coil?

after i`m swap coil and wires, problem is gone. thank you!

red line first cyl sensor. blue-ignition output signal. it`s uses npn transistor for signal output.

ECU drags that voltage down to 0V to send the signal for coil charging.
good. soon i`m made some mod for my prelude ecu

hmm... soon i`m get a 2 ch osscilogaph and try check how honda ecu use igniter unit. i`know what stock igniter unit control dwell and give a feedback to ecu (because ecu knows shoot spark or not).

i`m think it`s a signal inversion for msd trigger adapter.

i`m swap ignition coil and problem will gone. maybe short in primary coil?

last time i`m use a BU941ZPF. It`s have built in protection from othervoltage.

but transistor will died again. hmm...
maybe ecu uses some feedback for dwell time? it`s a jdm car and i`m don`t have any documentation for it.