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Hi, I have a bike dyno and currently I have the building GND cable connected to the dyno chassis. I tested some of my bikes on the dyno and had no problems but the other day I made a dyno run with my brothers bike with the sniffer connected and the wideband lambda controller that im using started to fail and its not working anymore. Should I also connect a ground cable between the bike chassis to the dyno chassis or is not necessary? Thnaks in advance