Bryan Smith
I have no knowledge of the system in question but I would have thought that a varying duty cycle should equal a varying vacuum to the actuator diaphragm. I reckon that if you supply permanent supply and earth then the valve should fully open, ie: 100% duty cycle.
Regards,
Bryan.
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BMW 330d 3.0 2002 - Black smoke under hard acceleration, code 1028 - Fixed # - Jamie Lambert April 7, 2011, 8:48 pm
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