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Old 08-08-2000, 12:30 AM   #1
Eric SS
Sooby Guru
Member#: 1914
Join Date: Jul 2000
Chapter/Region: SWIC
Location: 2014 Q60S, 2016 Chevy SS
2000 2.5RS w/ EJ22T
swap and N20. gone. : (

Exclamation O2 sensor question

I was going to hook up my Haltech A/F ratio meter today but cound't figure out which wire to hook it up to. All of the O2 sensors I have ever worked with idle at about .55 volts but the 2.5RS O2 sensor idles around 2.4 volts (If i had the right wire). I checked every wire (all six!) coming out of the O2 on both sides of the connector. The White wire was around .45 volts at idle but didn't change voltage regardless of engine rpm or load. Like I said, the only wire that changed under load idled at about 2.4 volts so I'm stumped.

What wire do I use or do I need a special A/F meter?

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Old 08-08-2000, 08:15 AM   #2
Scooby Newbie
Member#: 143
Join Date: Aug 1999
Location: Kanata, ON, Canada
1999 Impreza 2.5RS
Supercharged - and STOLEN


I'm assuming you have a MY00 -


A simple search under "O2 sensor" would've come with this web page among others.
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Old 08-08-2000, 10:19 AM   #3
Homicidal Maniac
Member#: 1612
Join Date: Jun 2000
Location: Austin, TX
2008 STI


Or an even more informative thread: http://www.i-club.com/ubb-files/Foru...ML/003366.html www.jumptronix.com sells a A/F voltage meter that will work with our front o2 sensor. The problem that I have run into, is I don't know what baseline numbers should be. I also pulled some really interesting/confusing data.
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