Originally Posted by DA92driver
if im not mistaken, the signal will be irratic befor the ecu no matter where you splice, o2 sends an analog signal of lean rich lean rich lean rich. the AD converter in the imput device in the ecu converts the analog(irratic) to a digital signal with the ecu can read, which you cant plice into, so no matter where you instal the wire, you will get an irratic signal if installed proerly.
Well yes and no. Your correct on how it converts it, but why do you think it tells you to hook it on the ECM side of ANY plugs ? A plug is huge resistance. The Autometer gauge needs the closest to the ECM signal it can get. the ECM can adjust for the wire length "impedence" it knows how to adjust for the loads. The Autometer gauges doesnt. Without getting WAY into it. The closer to the ECM the better.