Thread: Evo IX USDM fail safe (Mac valve) diagram?
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Old 11-01-2012, 12:29 AM
Richard L Richard L is offline
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Default Re: Evo IX USDM fail safe (Mac valve) diagram?
It would be much better if you can connect the mac valve to a switched 12V, active only at the "pre-crank" or "run" ignition key position.
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