Actually would love an entire software/hardware documentation package for the ECM, but realize I am probably dreaming..

If so, I've got the wiring diagram in a tidy little package.

12v.org has tons of useful info as well.

1, 0.3 - 1.1 volts. You should get a Bentley Manual (harcopy recommended over CD version).

It seems oriented towards determining when to replace a part, not figuring out how to modify or work around it.

I searched Bentley for MAF, and remain unsatisfied. Where did you find your 7.5 volt maximum number? It is somewhat out of blue. Had been expecting 5 V or 12 (nominal)