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Old 09-21-2002, 07:12 PM   #1
Midwayman
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Member#: 1997
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Location: Des Plaines, IL
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2006 Acura TL 6spd
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Default Rear o2 readings.

Havent had a chance to swap my front and rear sensors yet. Does the rear, read rich/lean or just slower than the front sensor?

Additionally, Ive heard you need a special socket for o2 sensors. Is this true, and where can I find one? Sears didnt seem to have it.
Thanks
B
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Old 09-21-2002, 08:10 PM   #2
Impreza Rider
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I used a 7/8" wrench for mine. The readings might be off a little, since there's a cat in the way, but I'm not sure if it'll read rich or lean
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Old 09-22-2002, 03:41 AM   #3
8Complex

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You can get the socket at pretty much any decent parts store that is worth their square footage of stock. I got mine at NAPA.

Be careful with them... my rear O2 is permanently stripped, even after being rethreaded and fitted with a new O2 sensor. I decided to leave mine in there and run a spare one in the front for the Haltech.
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Old 09-22-2002, 05:22 AM   #4
Drac9
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I think you mean you want to swap the rear to the front and the front to the rear. I don't think it would be a good idea to swap these sensors. They are different and take different readings. I think the ECU would get very confused if you swapped them. The second o2 sensor is basically only there to see if the cat is working correctly. Also, subaru has a bad habit of not using anti-seize compund when they install these at the factory. Hence, stripped threads. I stripped mine when I removed the O2 sensors to install them in the uppipe and downpipe. JUst go buy a $25 GM o2 sensor and have an extra hole drilled and bung welded on. Make sure to do it before the cats so you get an accurat reading from the gauge.
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Old 09-22-2002, 10:51 AM   #5
Impreza Rider
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Drac, he's running a Link, so it won't really matter which one is where.
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Old 09-22-2002, 02:26 PM   #6
Drac9
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Oh, my bad Swap away then. Just don't be surprised if you have to buy new O2 sensors after stripping the old ones. Subaru needs to start putting some anti-seize on these things. Oh, and not cross-threading them would help a lot too.
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