Quote:
Originally Posted by rusnak
Welllll....look I am not picking on you. But all an AFR meter does is measure the percentage oxygen in your fuel, and it extrapolates the fuel mixture calculation from that. It does not measure exhaust gasses such as CO or NOX.
OK, so your ECU or "Motronic" (Bosch L-Jetronic in other words) will take over and go into closed loop once the O2 sensor heats up. You'll notice that it will lean or richen the fuel mixuture until it gets to .99 to 1.01 Lambda. It does not allow your vehicle to run lean or rich. If your AFR is showing a lean mixture, then your fuel injection system is broken. I wrote a quite lengthy description of all this on Rennlist way back about 12 or 14 years ago.
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I don't have an 02 sensor. I run a custom tune. There's nothing wrong with my injection system. It's running in tip top order. No air leaks, no over or under feeding injectors, they've all been flow checked. No exhaust leaks. All gaskets have been recently replaced after the heads were rebuilt. It's strictly fuel dependent when it goes from 13.6-13.8 AFR to 14.3 or a little better.