Can the aem wideband afr gauge run the msd closed loop.It has an output of 0-5 volts.I have the closed loop chip,but have never used it as i have to weld in another lamda sensor.Just thinking,this could save me putting 2 sensors in the exhaust.

 

No mate the signal from the gauge will affect the output of the closed loop system, it needs it's own dedicated supply so you need to have two sensors as I have on mine which Stu fitted at MSD when he did mine!