Steve, great article! Now that I know what to search for, I'm finding plenty of info on evap temp sensors, but...

I checked the actual values with the engine off and cooled for approx. 8 hours. I'm not sure if my temp readings indicate a bad evap temp sensor or not becuase it is a really hot day. Here are the numbers. My car displays degrees F, so I assume the actual values use the same units.

1 98
2 93
3 105
4 102
5 123
6 116
7 08
8 98
9 27
10 4.8
11 3.8
12 4.3

Does this point to an evap temp sensor?

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1998 E320 120K mi
1991 Miata 80K mi
2001 Ranger 109K mi