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Old 12-02-2001, 02:20 PM   #1
Impreza25RS
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Member#: 4850
Join Date: Mar 2001
Location: Back to Boostin' in SLC!
Vehicle:
1998 EJ22.5RS-T
more mods coming soon!!

Default Hooked up my A/F gauge today.....

I just got done taking my car for a spin after I installed my A/F gauge. I noticed that the only time the gauge readings are constant is under WOT in which it reads rich which is normal to my understanding. When Im just at crusing speeds though the gauge bounces around A LOT from lean to stoich and doesnt stay constant by any means. Is this just the ECU relearning my driving or what? I just want to make sure my O2 sensor isnt cracked out and my wiring is fine. Thanks in advance for the help.
Kyle
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Old 12-02-2001, 02:38 PM   #2
Silverscooby27
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2013 Mustang GT Vert
2014 335i xdrive

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Sorry, I don't have a solution for you as I'm working on getting the A/F gauge + sensor mounted. But, I have a ? for you:

Did you mount an additional O2 gauge or did you use the second O2 sensor?
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Old 12-02-2001, 03:11 PM   #3
wac
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Kyle: it's all good. It's not learning your driving style - that's how it always runs under low loads. Enjoy.

S27: Kyle has a 1998 model that uses normal 0-1V O2 sensors front and back. They can work with the normal AFR gauges. The 1999 models should be the same as well.

-WaC
Wayne
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Old 12-02-2001, 06:08 PM   #4
kelley nelson
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Some good reading in 'Halmeter Info':

<a href="http://www.twminduction.com/Catalogs/Catalogs.html">http://www.twminduction.com/Catalogs/Catalogs.html</a>

It explains in there why the meter sways back and forth from lean to rich. It's totally normal. The reading will only stabilize under 80% and greater throttle.
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Old 12-02-2001, 08:42 PM   #5
Silverscooby27
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My understanding was that the MY99 used the "wide-range" O2 sensor at the front, but the 0-1v after the cat (which would be useless for tuning). Can anybody confirm this?
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