Am I to be grounding to the chassis? If I recall right, I picked up a ground signal on the two outside wires on the harness side (unplugged). I am pretty sure of that because, iirc, I put the red probe on the battery pos to get voltage readings on the outside wires, so they must be grounds, right??mott6904 wrote:..... then back prode the middle wire and see what it reads. If you rev the car up to about 2000 rpm it should jump around from 200 to 800 millvolts. If it doenst change at all then you have a bad o2 sensor.
I am discussing gauge options in my other thread. Need some input on good combo wideband o2 sensor with a matching gauge.
--TJ