Review on 📊 AEM 30-0310 X-Series Inline Wideband UEGO AFR Sensor Controller: Ultimate Air Fuel Ratio Monitoring Solution by Ryan Judy

I don't usually give bad reviews but this controller was a nightmare. I started configuring the ECM and followed my story for 3 days before realizing that the controller was giving poor readings, prompting me to fully begin configuring and optimizing the HP broadband voltage settings. The readings were wrong again for the next car. This was all verified by comparing the AFR readings to my broadband dynamometer, a 4 channel AEM. AEM states that their controllers do not require outdoor calibration. If I hadn't had another broadband to compare to, I would never have known the readings were wrong, other than the fact that the machines ran like crap based on the correction tables made with that broadband.