AU-test, just passed ?!?

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#1
Original: German · machine translated
Hello, dear V8s,
There's a question about the AU.
When I was at the last Au, there were initially serious problems, the values did not fit, he had measured in the left exhaust tailpipe (series). It just didn't fit. After that, he put his probe on the right pipe and, look, everything's fine.
What can that be, is it the left CAT? ==References== The Lamda probe ( 4.2 ABH 11/92 ). I have the feeling with the wave-like acceleration, but I'm not sure. Fact is, he always needs, at least 16l or more, although I really always ride very timidly ??
The following question follows. Have I ever read that there have been 2 Lambda probes on the 4.2, is that right ??
I'd be very pleased with the answers.

Many 8er Greetings sends Klaus
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#2
Also der 4 4.2 er haut auch nur 1 Sonde!
Wenn dann liegts am Kat das mit der AU!
Sonde evtl mal abstecken und sehen ob er weniger braucht oder evtl pulsieren weg ist!
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