[Matra et Alpine]

Originally Posted by hightower99

Matra your graph of a WEGO AFR Output does not say that it is for a broadband Lambda sensor. Are you sure that it isn't a narrow band? Another odd thing is that that graph shows linear output but hopefully you know that Lambda sensor outputs are not even close to linear.

Thank you, you've finally grasped the POINT
It IS wideband and the output IS linear ... why ? Because BUILT IN to the sensor is an op-amp and feedback. It controls the temp, the pump voltage and normalizes the ouptut. It's as I suspected, you don't see the complexity and the "model" in the o2 sensor and hence dont' grasp why it may be reading figures aligned with "normal" engine operation.

on the left is the "raw" sensor and on the right is the control loop producing the usable output. So a closed loop feedback control system. Which can often have a null or chaotic point where output isn't modelled correctly from the input. From Brad's info, I'd wonder if the sensor heater is up to the job of heating it up all the time as usually the sensor heater is only needed at initial start and for minor heat changes, not major continuous heating.



Good point about the NOx though. Brad ? you got numbers for exhaust contents ??