kdanner
Banned
NO it doesn't measure O2, it measures temp, the leaner the mix the higher the temp. When the o2 sensor sees a high temp condition it makes the computer aware and the computer makes the a/f richer thus cooling the exhaust temp. That's why we get such good milage with computer driven fuel injection systems. The computer/o2 sensor keep an almost lean condition. But of course you've know that for a long long long time.
OK buddy, because everyone knows the temp is the same at idle as it is at WOT.