[brucepick]

If you're going to work with WAI or HAI get some kind of intake air temperature monitoring (I did, for $10). You want to know the outside temperature and the temp of air going to the engine.

If you have a ScanGauge I think it might offer intake air temp monitoring.
Otherwise, get yourself down to your local big box auto parts stores and find an interior/exterior thermometer. Mine was $10, runs on 1 AAA battery. Plant the "exterior" sensor inside your air box, or if you dare, in the intake hose before the air mass meter (or whatever your car calls it). I take a look at it before starting my car; that's the outside air temperature. Then I watch it go up as the WAI goes to work.

You'll need to cut the wire lead, drill a roughly 1/8 inch hole in the airbox, put the sensor inside, run the lead out the hole, and solder it back together. Since the sensor has very high resistance just twisting the wires back together isn't enough - over time, accumulated resistance in the connection (dirt/corrosion etc) will throw off the readings. So solder.