rickyellow zee Posted May 24, 2016 Share Posted May 24, 2016 I plan on rewiring my CHTS with new wires cause the old wires are crusty. Is it okay to wire the ground wire directly to the chassis instead of back to the ECM? I also plan on rewiring the AFM ground as well to the same location.Thanks. Quote Link to comment Share on other sites More sharing options...
jacky4566 Posted July 12, 2016 Share Posted July 12, 2016 Best practice is to always ground your sensors nearest or directly to the microcontroller. You are working with small voltages that are easily upset by big stuff like the ignition system. That being said if the ecu is on the same ground it will probably be fine. If you feel like being overkill you could scope out the noise on the sensor right now and then again with the new wiring setup. Quote Link to comment Share on other sites More sharing options...
Tony D Posted July 13, 2016 Share Posted July 13, 2016 I wouldn't float it. Quote Link to comment Share on other sites More sharing options...
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