After testing 6 or so used AFMs and 2 remanufactured AFMs, I finally found one that passed OEM specs with flying colors. I performed the lobotomy and things seem rather promising. It has only given me a slightly goofy idle one time and doesn't ping as badly as before. It still pings a bit-especially at partial throttle like when I give just a little extra to pass and in the heat of the day. I've put about 100 miles on it with 87 octane and it seems to be better.

I'd still like to check fuel pressure. That was something that was recommended to me along with the AFM by a Toyota wrench a little while back. I'm having a heck of a time finding a gauge though. As soon as I find one, I'll check things out. Maybe I'll find another problem and put an end to this once and for all!

I'll report new MPG findings at my next fill up. I'm hoping it's improved quite a bit.