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Old 11-23-2012, 08:02 PM   #94
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Originally Posted by ssiptang View Post
Or I don't have to since its being grounded at OBD port by SCT?
Late reply but don't worry about setting up any type of ground using your Firewire cable "ports". The Firewire cable is simply being used as a convenient signalling method; the AFR gauge is grounded as is the OBD port.
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