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 Post subject: oxygen sensor
PostPosted: Mon Sep 06, 2010 11:32 am 
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Joined: Sun Feb 29, 2004 9:50 am
Posts: 48
Location: Tx
can anyone tell me what the downstream oxygen sensor does, friend at work had his deleated on his pickup build. i would assume that it tells the computor if the converter is working and would have no other effect on the running of the engine, but i have been wrong before.


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 Post subject: Re: oxygen sensor
PostPosted: Mon Sep 06, 2010 10:43 pm 
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Joined: Tue Dec 14, 2004 11:55 pm
Posts: 1257
Location: So. Calif
That's all I've heard it does (monitor the cat to make sure it's still working)

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1992 Geo metro, 1.0L 5spd, 511,000miles on original engine & trans
- First time engine work at 456K miles, bad headgasket. Rebuilt head, Felpro gasket installed.
- knuckles/hubs/brakes/13" wheels from a 2000 Metro, running 175 70R13
- New bearings and 1st/2nd synchros at 440.5K miles.
- MPGuino
- Averaging ~ 51MPG these days


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 Post subject: Re: oxygen sensor
PostPosted: Wed Sep 22, 2010 2:37 pm 
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Joined: Mon Jun 18, 2007 1:35 pm
Posts: 2433
Location: Regina, SK
Yes, but if it doesn't function properly, the computer will not go in closed loop, instead it will sit in open loop, and you'll get less power and worse fuel economy.

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My cars:

J. McBean: '98 Suzuki Swift 1.3L 16v SOHC 5sp+ "Mk5" Made in Canada
The Mini Rattler: '94 Suzuki Swift .993L 6v SOHC 5sp+ "Mk3" Made in Canada *The Winter Beater*
B. Berry: '90 Chevrolet Turbo Sprint 1.0L 6v SOHC 5sp+ "Mk2" Made in Japan

I got 18MPG in a 3cyl with a 5 speed manual 4dr, '93 Metro! :yeahyeah


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