Help me AEU86, you're my only hope

[jondee86]

Interesting !! I have seen narrow band gauges that light LED's to show the
voltage, but never one that was actually calibrated to specific lambda
values. So that is my new thing for today learned already Claims about
reaction speed and legibility are not really helpful. It is difficult to get much
information from a gauge that rapidly changing values to track volatile
events such as combustion cycles.

I used an old Innovate LC-1 wide band digital gauge and it had three
settings to slow the gauge down by averaging the displayed readings over
(from memory) the last 3, 6 or 12 samples. This cut down jitter on my log
files so that I got more realistic "steady state" readings for tuning my fuel
map. But I was still able to see what was happening during transitions for
adjusting enrichments.

The LC-1 controlled the sensor heating and would not allow AFR readings
to display until the sensor was at operating temperature. It also had a
simulated narrow band output that I used with a factory ECU before I
installed a new aftermarket ECU. Then I connected the wide band date
output directly to the ECU for maximum accuracy.

For an inexpensive gauge and controller package I thought the LC-1
worked very well. However, that is just me and I don't suggest that it is
the best or only way to monitor AFR's. You and others may find the
combination of wide and narrow band gauges helpful and I have no
argument with that. But for the OP trying to troubleshoot with a narrow
band that may or may not be wired or operating correctly, I stand by my
recommendation. A basic wide band gauge and controller setup, once
correctly installed and calibrated in fresh air is going to immediately provide
useful information.

Cheers... jondee86