I am having the same issue with my AutoMeter wideband A/F gauge. Start up and idle it shows 14.6/7. I followed the YT link in the thread. I removed the sensor, and started my car. My gauge showed 3 dashes, and never changed.
This was a new, fresh install. If I understand correct, you "should" tie the ground wire to the negative battery terminal. I have my positive wire hooked to a "switched 12V source" as directed in the instruction manual.
https://www.svtperformance.com/forums/threads/autometer-wideband-afr-gauge-problem.1003426/
This was a new, fresh install. If I understand correct, you "should" tie the ground wire to the negative battery terminal. I have my positive wire hooked to a "switched 12V source" as directed in the instruction manual.
https://www.svtperformance.com/forums/threads/autometer-wideband-afr-gauge-problem.1003426/