Quote:
Originally Posted by Ladogaboy
No, 1 Lambda = stoich/14.7:1 AFR, so .9 Lambda = 13.23:1 AFR. Likewise, 1.1 Lambda = 16.17:1 AFR.
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Thanks! Your comments sent me back to the UltraGauge user manual and I learned something. In my earlier posts I had it backwards as to what the UG numbers mean. Quoting the manual: "positive values indicate a lean condition exists and the injector is left open longer to compensate, thus adding more fuel" (p.17). Now that means that a UG reading of +1.56% long term fuel trim is 1.0156 lambda, a lean condition, and my car will add more fuel to maintain stoich? That's not good for fuel economy. Better would be negative percentages, indicating rich condition, in response to which the car's ECU will seek stoich by reducing fuel.
Do I have that right?