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89 BMW 325IS Idle Speed Control.
Posted to Technical Discussion Forum on 10/17/2002 2 Replies

[1989 BMW 325is, ISC Waveform] shows the waveform on the two coils in the Idle Air Valve. On the one coil maximum voltage is equal to B+, the other one shows spikes close to 30V. It has been a long time since I have seen one of these. My question is: Does this... Login to read more.

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