Stock primary O2 vs Analog Wideband Input

FlashPro Manager software
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balla_EG6
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Stock primary O2 vs Analog Wideband Input

Post 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
2004 EVO VIII - www.nrteam.org
balla_EG6
Posts: 15
Joined: Sun Jul 20, 2014 9:02 pm

Re: Stock primary O2 vs Analog Wideband Input

Post by balla_EG6 »

just tought about cheating my WOT target to 0.90 to see if my AEM reads 0.86 ...
2004 EVO VIII - www.nrteam.org
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Spunkster
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Re: Stock primary O2 vs Analog Wideband Input

Post by Spunkster »

What vehicle are you referring to?
balla_EG6
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Re: Stock primary O2 vs Analog Wideband Input

Post by balla_EG6 »

Sorry... Civic SI 2008 with K24Z block. Invidia header, Injen CAI, ID1000 injectors, 12.5:1 pistons, ethanol. FlashPRO bt
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Spunkster
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Re: Stock primary O2 vs Analog Wideband Input

Post by Spunkster »

How exactly do you have the AEM wideband wired (power, ground, signal)?
balla_EG6
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Re: Stock primary O2 vs Analog Wideband Input

Post by balla_EG6 »

Power - ign 12v fusebox
Ground - under fusebox (chassis)
Signal - UEGO white wire to ECU B29 EGRL

Voltage offset 0v
2004 EVO VIII - www.nrteam.org
balla_EG6
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Re: Stock primary O2 vs Analog Wideband Input

Post by balla_EG6 »

At low rpm they seem to show very similar AFRs

The uego sensor is 2" from stock
2004 EVO VIII - www.nrteam.org
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Spunkster
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Re: Stock primary O2 vs Analog Wideband Input

Post by Spunkster »

Unfortunately I do not have any way for you to make an adjustment to make them match in this instance.
balla_EG6
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Re: Stock primary O2 vs Analog Wideband Input

Post by balla_EG6 »

I will try a new O2 sensor.
Must be OEM HONDA ?
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Re: Stock primary O2 vs Analog Wideband Input

Post 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.
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