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Old 04-06-2004, 02:16 AM   #1
vf39hipsi
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Default A/F Gauge install

Where do you hook up on the STi???, and is the autometer one accurate or just a light show?
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Old 04-06-2004, 02:38 AM   #2
MB38
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1997 Supra Turbo

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Well, A/F gauges are fairly useless on WRXs unless you install your own sensor. As soon as you install all of your exhaust plumbing, you'll lose the sensor.

At least, that is, if it's like the WRX. Perhaps the lack of an up-pipe cat to replace makes it different on the STi.
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Old 04-06-2004, 10:56 AM   #3
mbiker97
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No it's worthless on the STi too. The factory narrowbands will only give you a light show. It won't show any good real information.

I'd hook it up on the STi by selling the gauge and buying something useful.
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Old 04-06-2004, 12:50 PM   #4
vf39hipsi
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what would be a good solution to see how rich I'm running?
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Old 04-06-2004, 01:13 PM   #5
1DOWNCLOWN
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silver

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egt gauge i think
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Old 04-06-2004, 02:49 PM   #6
mbiker97
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Quote:
Originally posted by vf39hipsi
what would be a good solution to see how rich I'm running?
Either buy a wideband (~$350) or you can _sort of_ see it with an EGT gauge. You WON'T be able to see how rich you are from the factory sensors. They aren't accurate except near 14.7:1.
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Old 05-13-2004, 11:45 PM   #7
Tuned
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I just did a search and found this thread from about a month ago.

So to make sure i understand, if I buy a GReddy A/F gauge and hook it up to the factory 02 sensor it will be a waste of money because the factory 02 sensor can't read a value below about 11? And in order to have the A/F gauge work correctly I would have to spend another $350 to buy a decent 02 sensor?

Please clarify.

Thanks,

Jeff
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Old 05-14-2004, 10:36 AM   #8
mbiker97
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Quote:
Originally posted by Tuned
I just did a search and found this thread from about a month ago.

So to make sure i understand, if I buy a GReddy A/F gauge and hook it up to the factory 02 sensor it will be a waste of money because the factory 02 sensor can't read a value below about 11? And in order to have the A/F gauge work correctly I would have to spend another $350 to buy a decent 02 sensor?
To get an accurate a/f reading from a gauge you need to buy a wideband O2 sensor. Most of the wideband kits come with some sort of gauge so you wouldn't need to go buy another one. If you hook up a gauge to the factory sensors then it is just a fancy light show.
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Old 05-14-2004, 12:09 PM   #9
Tuned
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Thanks. I appreciate your help.

Jeff
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