Did a bit of research and so far as I can tell the Lamda sensor post cat should always be a steady voltage usually between 500 to 700 mV. Is this correct for the Omega 4 pot?
Thanks
IME there are times when it is and times when it isn't. Clearly, until the cat is nice and hot, it will just mirror the front lambda sensor. After that, there will be times when the ECU is checking the cat efficiency where the rear sensors will cycle too, but with a delay from the front sensors. Other times, they will be pegged at lean. The only thing that can really tell if the signals are correct is the ECU, and if it isn't happy it'll raise a trouble code.
Thanks Kevin for the info.
Much appreciated. Its obviously a steep learning curve, but will be well worth the effort come the end. I do have a scan tool now that is able to give me recorded live data with scope like graphs to look through afterwards. Not the best but a very good starting point.
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Topic: Long term fuel trim (Read 3637 times)