Greg Milne Posted October 9, 2013 Report Share Posted October 9, 2013 Hi, I'm piggybacking to a factory ecu. Engine has 2 x two wire knock sensors. Can I just hook the G4 kncock sensor wires to the signal wire from the original knock sensors, and leave the ground wire attached to the original ecu, or does the G4 need to be referenced to this as well. Cheers Greg Quote Link to comment Share on other sites More sharing options...
Simon Posted October 14, 2013 Report Share Posted October 14, 2013 Yep just connecting the signal wire is the way to go. The factory system can provide the ground. Quote Link to comment Share on other sites More sharing options...
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