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Originally Posted by Richard L
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The System 2d has a fuel injector duty cyclee monitor circuitry in-build. You can connect a volt meter (analogue type is easier to read) to the purple wire and see how wide the injector are opening eniminate the "airflow sensor" maxing-out theory. 0-5V = 0-100% duty cycle - 5% accurate but good enough for this purpose.
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I've done that already.
It frequently rushes to 80% DC when I rev it to the red line. I even saw 90% once or twice :shock:
I guess the poor little motor has been strained for all these years. Maybe I'll need bigger fuel injector for the coming pre-comp injection.