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Oxygen sensor replacement?

Old Sep 14, 2000 | 11:45 AM
  #1  
Stuart Moss's Avatar
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From: Warrenton, VA U.S.A.
Oxygen sensor replacement?

I have the original oxygen sensor with 91K miles on it. I have no reason to believe it's bad other than my gas mileage seems to be about 2-3mpg worse than it was two years ago (about 40K miles ago).

If I had a scanner, would I be able to determine the condition of the oxygen sensor?

Should I replace it based just on the mileage?
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Old Sep 14, 2000 | 11:49 AM
  #2  
fb305svs's Avatar
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Joined: Sep 1999
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From: Oakville, Ct
Car: 1991Firebird T/A
Engine: 350
Transmission: Modified Viper t-56
Axle/Gears: dana 44, 3.55
The O2 sensor is actually a dail maintence item. it is supposed to be replaced every 20,000 or so. You should replace it. i think u will find that your milage will improve as well as engine performace.

Steve

------------------
86 Firebird, LG4, t-tops, 2.73 open rear, SLP 3 inch cat back exhaust, catco cat, Coming mods: Edlebrock 1 5/8's Headers, 2 inch cowl hood with custon alumin cold air box, 3.42 posi disc rear, T56, and hopefully a new set of heads and a nice CAM!

My Webpage- Battle of the birds, My own Thirdgen Page, still under construction, http://www.geocities.com/soares711/index.htm

88 Firebird Formula- deseased 2/9/99- 305 TPI, SLP 3 inch exhaust, SLP Intake runners, SLP cam, 3.45 BW disc brake posi, WS6, NOS, and all that good stuff, 13.8 on the motor, 12.89 on NOS and slicks! Hit by what else!?!? a FORD EXPLORER!!!!!!
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Old Sep 16, 2000 | 07:08 PM
  #3  
MikeInAZ's Avatar
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Joined: Oct 1999
Posts: 735
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From: Portales, NM USA
Car: 86 T/A
Engine: 5.0 TPI
Transmission: 700R4
Due to the reasonable price of an O2 sensor I'd just replace it. Wait a few more miles and you may never be able to budge that thing.
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Old Sep 17, 2000 | 08:38 PM
  #4  
Allan's Avatar
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Joined: Jul 1999
Posts: 1,405
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From: USA
Car: 1988 IROC-Z
Engine: 5.7L TPI
Transmission: 700R4
Axle/Gears: BW 2.77
Originally posted by MikeInAZ:
Due to the reasonable price of an O2 sensor I'd just replace it. Wait a few more miles and you may never be able to budge that thing.
Some have more luck than others. Mine had a 103K miles on it before I changed mine. Came out like a spark plug ... thank God! I've heard horror stories about that!
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