I don't have my manual with me here, but I think 7.5k ohms or 7500 ohms would be more like it. I seem to remember using a 6.8k ohm resistor to test with in the past. If memory serves it seems the air temp sensor can alter the mixture +/- 10 % ? I'm notsure that may have been on the old analog ecu?
I really aint sure I was checking it right but, I was getting 11.9k ohms at 72 degrees. If I changed the setting on the multimeter it just moved the decimal point fwd or backward. Does this number look off?