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Stock primary O2 vs Analog Wideband Input
Posted: Tue Feb 06, 2018 4:03 pm
by balla_EG6
Hello guys
I have an AEM UEGO attached to B29 (EGR) and configured in closed loop as the wideband input.
At logs, I see that past 4000rpm , the stock O2 (corrected) differs from the UEGO a bit. Eg, 0.87 lambda at stock and 0.83 at AEM. No matter what, Hondata uses the Stock O2 for closed loop (even setting the EGR pin as wideband input), so I cant fix my A/F ratio. My WOT target is 0.86.
Thats a bad stock O2 maybe ?
Any fixes besides changing to a new stock wideband sensor?
Thanks
Re: Stock primary O2 vs Analog Wideband Input
Posted: Tue Feb 06, 2018 4:11 pm
by balla_EG6
just tought about cheating my WOT target to 0.90 to see if my AEM reads 0.86 ...
Re: Stock primary O2 vs Analog Wideband Input
Posted: Tue Feb 06, 2018 4:49 pm
by Spunkster
What vehicle are you referring to?
Re: Stock primary O2 vs Analog Wideband Input
Posted: Wed Feb 07, 2018 4:59 am
by balla_EG6
Sorry... Civic SI 2008 with K24Z block. Invidia header, Injen CAI, ID1000 injectors, 12.5:1 pistons, ethanol. FlashPRO bt
Re: Stock primary O2 vs Analog Wideband Input
Posted: Wed Feb 07, 2018 1:47 pm
by Spunkster
How exactly do you have the AEM wideband wired (power, ground, signal)?
Re: Stock primary O2 vs Analog Wideband Input
Posted: Wed Feb 07, 2018 2:41 pm
by balla_EG6
Power - ign 12v fusebox
Ground - under fusebox (chassis)
Signal - UEGO white wire to ECU B29 EGRL
Voltage offset 0v
Re: Stock primary O2 vs Analog Wideband Input
Posted: Wed Feb 07, 2018 2:48 pm
by balla_EG6
At low rpm they seem to show very similar AFRs
The uego sensor is 2" from stock
Re: Stock primary O2 vs Analog Wideband Input
Posted: Wed Feb 07, 2018 5:20 pm
by Spunkster
Unfortunately I do not have any way for you to make an adjustment to make them match in this instance.
Re: Stock primary O2 vs Analog Wideband Input
Posted: Wed Feb 07, 2018 7:26 pm
by balla_EG6
I will try a new O2 sensor.
Must be OEM HONDA ?
Re: Stock primary O2 vs Analog Wideband Input
Posted: Thu Feb 08, 2018 10:09 am
by Spunkster
About the only thing I can think for you to try would be to ground the Wideband to one of the ground wires at the ECU.