Robert,
It seems like you have some terminology mixed up. The TEMPI sensor does NOT
feed the temperature. It is buried in the AFM and is not easily replaceable.
The chart you provided  is indeed for the TEMPI (and TEMPII) sensor. The
sensor that operates the gauge is very different, electrically.
    The gauge's sender has a black plastic body with part#251919501. I have
one sitting in of me. The temperature is 81°F and I am reading 723 ohms.

Hope this helps,
Ken Lewis
http://neksiwel.20m.com/

PS. Is the gas gauge reading correctly?