throttle position switch

rockford, I just copied and paste this from this site: http://audi.humanspeakers.com/tuning-cise.htm see if this makes any sense.

CIS-E uses two switches to enter "special" modes of operation. One of these two switches tells the computer when your foot is off the loud pedal. Under these conditions the engine is run at settings that are especially efficient, or at least very clean. At idle, the ISV is used to regulate the amount of air reaching the engine, to maintain a steady rpm. The other switch is activated during the 30% or so of widest throttle opening, and when the ECU receives this signal it abandons economy and cleanliness in favor of running the engine at a slightly rich setting. This puts the engine into a more powerful fuel/air mixture range, and also helps prevent knocking.

(In between these points, it runs in "closed loop," reading the oxygen sensor on the fly and continuously adjusting the fuel supply to minimise emissions and maximise fuel economy.)

To test these switches, just unplug the connector(s) going to them and use a multimeter set to "ohms" or "resistance" to measure what they are doing. When the throttle is partly open they should both read "infinite" or "out of range". This means the switch is "open." At a rest throttle position the idle switch, which is usually under the throttle body, should read "zero" ohms. When the throttle is opened most of the way the WOT switch, which is usually visible on the top of the throttle body, should read "zero" ohms.

If either switch does not function properly, cleaning may help, but the best thing to do is replace them.