I've datalogged it with my MAFT Pro in the past, the specs say 4200RPM and over 2.7v (approx 70% throttle), but my results were quite different. That's all rather academic though. With the car running rev the engine up over 4K and you should see the actuator diaphragm's armature move. Another option is to put a resistor and LED across the vsv's wires, don't forget to add a 1n4xxx diode to clamp any induced surges. Then you'll have a little light to reflect whenever the ACIS is active.
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