Hi all,

So,

I checked all the FI sensors and other peripherals. The idle valve,
full throttle enrichment
                                                        switch, checked
all the voltages and resistance per Bentley. All checked out good.
Checked the ignition timing. Swapped out the ECU, removed the catalytic
converter.
All didn't make a difference. I just filled her up and calculated I'm
getting 8 mpg. This NEVER happened. Seems insane. Maybe she's starting
to behave like her possible Detroit replacement.

I am going to order a new AFM from Busdepot. Seems like a  very good
deal actually.

It's the only thing I can see being bad, though I can't tell for sure
that my AFM is bad. The spec in both Bentley and Haynes don't specify
exactly whereabouts the resistance would be if you move the flap. It
just says" varying voltage", but no more. As I move it around I get
fluctuations between 1100 and 1600 ohms, but it doesn't steadily
increase in either one direction. While it idles, the potentiometer arm
vibrates, when I open the throttle, it gets steady again.

I'll keep you all posted on what happens, hopefully the new AFM will
make a difference.

Happy Trails

matthias