The codes were due to having the thing torn open while it was running. Of the four only two threw the light on. One was due to a loss of signal from the AMM (it was removed) and the other one had to do with the mixture being off. Since a lot of vacuum lines were disconnected I can see why the computer thought the O2 sensor had taken a dump.

The filament in my MAF/AMM seems to be thinner than you describe, nearly invisible, but it was there and was connected at both ends. I guess such a light test fishing line is pretty thin, however. I am guessing, here...

Everything seems to be fine now, however. I drove it last night, but it was cool out. (low 70s to high 60s) and no CEL. Got home and no codes from the AMM or the O2 sensor. I will drive it hard today, but it will be fairly cool outside (only into the 80s, I think).

Here is what I got last night:

1-1-3 = Fuel trim (lambda control) too lean or rich (This code turns on the CEL.)

3-1-1 = Signal missing from speedometer (my speedo has been intermittent for years and only came back on two days ago, so that code is from before all this)

1-2-1 = Faulty signal to/from Air Mass Meter (This code turns on the CEL.)

3-2-2 = Air Mass Meter wire burn-off signal absent or faulty (This also makes sense as a result of it being unplugged. It cannot do the burn-off cycle if it is not present.)

I think my AMM is probably fine. I will keep checking my codes for a while, though.

Thanks!


--
Mama always told me to eschew obfuscation...