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post #1 of (permalink) Old 09-26-2000, 06:16 PM Thread Starter
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Kinda OT Oxygen sensors

This is off topic for my application, but is a jeep issue..I just got my new four wheeler yesterday and read an article about changing oxygen sensors. Now I don't have one on my jeep, I do have one on my Suburban (grocery cart and tow vehicle). My question is, why do I need to replace a closed system sensor. Do they clog inside? Do they carbon up real bad that you can't clean them? Or is it an advertising thing that makes people spend money on something that has no real merit? Please enlighten me on these issues. Thanks for the excellent help, Ricky...seeya...

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post #2 of (permalink) Old 09-26-2000, 06:37 PM
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Re: Kinda OT Oxygen sensors

you can read about the o2 sensor at this site which might shed some light[img]/wwwthreads_images/icons/smile.gif[/img]

http://www.off-road.com/jeep/tech/258bbd/Major.htm


post #3 of (permalink) Old 09-26-2000, 07:00 PM
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Re: Kinda OT Oxygen sensors

They deteriorate with age. They can also become contaminated. In general, newer vehicles, where nothing has been done to hurt the sensor, can go well over 100K miles. The so-called 'tune-up', today, for modern cars, includes a quick test for 'sluggishness' of the O2 sensor. If the sensor has become 'lazy' (trade-talk), it is replaced. Volvo (first to widely use the sensor) originally recommended replacement at about 25 or 30K. I've personally run a Volvo well over 100K, checking the sensor often, and never had a sensor problem.
I haven't looked at the reference site... I will check it out.

bobH
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post #4 of (permalink) Old 09-26-2000, 08:05 PM
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Re: Kinda OT Oxygen sensors

I had to replace the O2 sensor on my ZJ. The check engine light would come on for a few days, then turn off for a few days. It did this for months, so I guess it started with around 50K miles on the vehicle. Anyway, I was pissed when I read that article. They made it sound soooo easy. It took me two days before I finally gave up and said I couldn't get it out. Over time, the different kinds of metals had welded themselves together. So I brought it to a shop, who eventually got it out with a torch and an impact wrench. I had to have that whole section of the exhaust pipe replaced.

It was after all this was said and done when I realized the '96 and newer ZJ's have two oxygen sensors. I had changed the wrong one.

canis
'82 CJ-7/360/727/D300/M.O.R.E. shackles and lots of ideas!

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