Quote:
Originally Posted by Raimo5
I would advise to take a moment and read through that entire article in ISTA and then also read Oxygen sensor before catalytic converter. It would give a better insight to those sensors and would also point out that you are looking at wrong sensors. Post cat sensors only measure the efficiency of cats and dont contribute to fuel trim. You need to look at pre cat sensors as these are wide band regulating probes.
Pay special attention to part that relates to reference air. You reference air ports might be plugged, post water fording.
You can see data valus if you go to ECU tree, select an ECU (DME in your case) and then press button, I think it was something like "call up ECU functions" or something on lower left corner. There you can trigger different things and view live data.
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Great info. Will look at this while having my coffee this morning.