[1.2gees]

I have one more book to read before I actually do anything, I may find something there. If you want you can let me do it to my own car, and report results before you mess with yours.

One thing that I THINK you're overlooking, the DME doesn't know that the oxy sensor is at operating temperature. One more thing, since the DME will think the engine isn't warm (yet), it will run the car richer until it thinks it's warm. This is why emissions are a lot worse when the engine is cold as well. Regardless of the O2 sensor output.

The temp sensor seems to be a more important input to the DME for the mixture, IF the sensor reads cold. Let me put it this way, the DME is programmed to run for max. power (or let's say richer, with timing altered for more power) when the engine is cold, so even if the oxygen sensor output was considered, it would still not make for much of a change. If anything, this would keep the mixture at the desired (but richer than stock) ratio. Anyway, there's again why I don't want to install an on/off switch, instead of an adjustible one. Firstoff, often changes that occur in a smaller amount of time, then is logical are ignored, also the ability to get back perfect emmissions and fuel economy is always there with an adjustible switch.

As for calibrating the surface area removed from the afm, vs. tension (reduced)? I'm thinking mark the flap position at given rpm, with given throttle opennings. Drill holes +back off the tension, and try again. Then keep playing with the spring tension, until all the positions match, or are close.

PS: I've got one more book left to read, then I'll be doing these mods to my car, specially the AFM, you can wait until I try it on my car, then I'll be able to help you if you run into anything as well. I don't plan to take the AFM apart, taking it off the air box, and the injection boot should be enough. Just get a drill, and drill it from the engine side, to the air filter side. There's nothing to hit that I can think of if you go this way, since the potentiometer is above the assy, on the outside. With the exception of the temp. sensor that's located inside the AFM.
Ahmet

------------------
It's all the driver...