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Voltage not reading correct afr
Posted: Mon May 01, 2017 7:50 pm
by maych87
I am using my jimstim to test some outputs. I noticed that my wideband o2 voltage seems off. So I checked it. At 0v it should read 10 afr. It reads 10.1afr. Is that normal. If not how do I correct this. Attached is a picture of the calibrate afr table, afr gauge and exhaust gas oxygen voltage. As you can see it's set to 0v and is reading 10.1 afr.
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Re: Voltage not reading correct afr
Posted: Mon May 01, 2017 8:31 pm
by racingmini_mtl
That's an artifact of the lag factor computation. If you set the Lambda lag factor to 100 (no smoothing), you will have the correct 10.0 at 0V. But you may then have a significant amount of noise on the AFR value.
Jean
Re: Voltage not reading correct afr
Posted: Tue May 02, 2017 11:39 am
by maych87
Does smoothing only affect the gauge reading? Or does it also affect how the reading is interpreted in the fuel tables?
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Re: Voltage not reading correct afr
Posted: Tue May 02, 2017 2:02 pm
by racingmini_mtl
It affects everything.
Re: Voltage not reading correct afr
Posted: Tue May 02, 2017 3:43 pm
by maych87
That does not give you a bad tune on the fuel tables? Is there a recommended lambda lag factor to set it to?
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