Lambda Sensors?
Discussion
Bear with me on this one Guys just thinking outside the box
My S3 is a decat therfore as the name suggests no Cat Convertor.It does not have AFMs but did have Lambda Sensors making the ECM "closed loop".
On reading about these lambdas it is my understanding that they provide a varied voltage output typically 0.25v to 0.85v depending how rich or lean the engine is running.This voltage is then fed back to the ECU and the injector "open" duration is ajusted acordingly to recify the over richness or leaness of the fuel/air mixture.
They are also there to protect the Cat Convertor and prolong its life.
Since I have no Cats fitted is there any need for Lambdas?
I was thinking of a fixed voltage back to the ECU of say 0.5v via a resitor, stepped down from the 5v referance voltage supplied to all sensors that the ECU is monitoring. Or maybe a variable resistor between 0.25v and 0.85v that way you can vary the richness for the emissions test.
Any thought on this?
Regards
Neil
My S3 is a decat therfore as the name suggests no Cat Convertor.It does not have AFMs but did have Lambda Sensors making the ECM "closed loop".
On reading about these lambdas it is my understanding that they provide a varied voltage output typically 0.25v to 0.85v depending how rich or lean the engine is running.This voltage is then fed back to the ECU and the injector "open" duration is ajusted acordingly to recify the over richness or leaness of the fuel/air mixture.
They are also there to protect the Cat Convertor and prolong its life.
Since I have no Cats fitted is there any need for Lambdas?
I was thinking of a fixed voltage back to the ECU of say 0.5v via a resitor, stepped down from the 5v referance voltage supplied to all sensors that the ECU is monitoring. Or maybe a variable resistor between 0.25v and 0.85v that way you can vary the richness for the emissions test.
Any thought on this?
Regards
Neil
Yes you definately need them - its still feeding back to the ECU and the ECU adjusts accordingly.
Non cat cars have air flow meters and its all predictive - you have the next stage on in terms of technology where the ECU is actually measuring whats coming out the engine and adjusting accordingly to keep the engine in tune, to keep emissions down and use less fuel.
Non cat cars have air flow meters and its all predictive - you have the next stage on in terms of technology where the ECU is actually measuring whats coming out the engine and adjusting accordingly to keep the engine in tune, to keep emissions down and use less fuel.
Im not sure waht ECU you have , but the 14cux type looks for simply a changing voltage from the lambda probes to say the mixture is cycling around lambda 1, the voltage is not measured as such, its the changing state that is important, so you cant feed in a fixed voltage to trim the mixture.
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