[Matra et Alpine]

Originally Posted by hightower99

You wanted to be high and mighty

No I only pointed out that the sensor is a complex part in a complex control system.

and point out that the output of narrow band lambda sensor is a voltage

The output of wideband is a voltage too

... and tried to imply that they don't measure oxygen concentration directly but through the use of a complex multi-variable model. I simply pointed out how a broadband lambda sensor works (since they would probably be using a broadband instead of a narrowband) and that there is a well known direct relation between the voltage or current output and the gas oxygen content.

You yourself listed the parts and all I was saying earlier is that a variable in the engine operation that does not fit in to the model design causes unknown results.
Widebands are sensitive to exhaust gas pressure -- you should know that if you know about them Also the control loop on the pump timing can make a difference in different circumstances.