Like Ron said in his other reply to you, we're here to help each other.
relearn - you've got the basic idea. (you let it idle up to proper operating temp/closed loop, before driving, right?)
I've done some research of my own on the WOT part (I drive a GM product of a similar year myself), and there's a key tidbit that depending on the roads in your area can be a bit tricky to adhere to:
after you achieve the top speed of the run at "WOT," you have to get right off the gas and coast to about 20-25mph before you touch the brakes - it's fine tuning ignition (and in some cases valve) timing and re-writing the fuel map.
Why is that key? well, touching the brakes changes the signal that the MAP sensor sees (brakes are vacuum assisted, right? that big pulse if you hit them messes with the process), and the MAP waveform is used to adjust ignition timing and fuel delivery.
the ignition off part writes what the computer just learned into memory, updating the stock/factory programming.
another thing about the GM OBD2 warm-up cycle - it tests the EGR at about halfway to operating temp from a cold start (In my case, just shy of where the needle hits the lowest temperature mark on the gauge: I can hear the 3 solenoids cycle -clickah clicka clicka) and THEN it starts listening to the upstream o2 sensor, which gives the heater circuits of that sensor time to get to proper temp as well. that's to compare throttle position, idle speed, timing, fuel delivery, etc for that day to the baseline you established with the re-learn drive.
except for on really cold days, this whole process should take less than 3 minutes. (see what the engine coolant temp sensor is there for now?)
There's a concept I'd like to get everyone thinking about, because it's where the 14.7:1 stoichometric ratio comes from: what's referred to as standard temperature and pressure, or a "standard day". That's 16 degrees C/61F and 29.92 inHg - your car's computer uses this as well.
lower pressure than standard means -literally- there's less oxygen in the air, so to maintain the 14.7:1, it has to deliver less fuel. temperature - lower means the air (meaning oxygen) is more dense and plentiful, so the computer needs to send more fuel to keep 14.7:1 (this is the big why behind your fuel consumption increasing in winter)
so - as a real world example: the temperature of the air here today is 26 degrees, and the pressure is 29.82" - when I turn my key to the run position before starting, the MAF sensor tells the computer "hey, it's warmer than standard" and the MAP sensor says "yup, the pressure is lower than standard" so the computer doesn't need to have the expected injector pulse duration to fire up. once the engine coolant hits the pre-set temperature, the computer starts to fine tune those injector pulse widths, which it verifies with the o2 sensors, and closes down the throttle plate, adjusts ignition timing...
the reason we have to take special care re-educating the computers of our cars after grooving them is because the groove makes special things happen to how an engine works, and the computer needs the time to figure all of that out. hopefully this reply has helped you put all of it more closely together in your computer too.
