how long can this keep going on...? - Ranger-Forums - The Ultimate Ford Ranger Resource


4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 08-13-2006
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how long can this keep going on...?

its been 117000 miles and ive never changed them in the 80000 ive had her, think its a good idea to change my o2 sensors? nobody ever says how long you should go on a pair (theres only 2 on a 4.0, right? thats all i found) have a sneeky suspiction itll help my mileage.

ps- before or after a seafoam treatment? before, right?
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Old 08-13-2006
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i dont think you would need to change it if it hasnt gone bad..if its still truckin along then i think you would be good to go..

i could be wrong tho..
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Old 08-13-2006
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....if its not broke, dont fix it.....trust me, if its working fine now, leave well enough alone!
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Old 08-13-2006
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Old 08-13-2006
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o2 60k-100k life Upstreams only. The downsteams monitor the cat(s).

old o2's may effect mileage
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Old 08-13-2006
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Quote:
Originally Posted by DangaRanger99
....if its not broke, dont fix it.....trust me, if its working fine now, leave well enough alone!
let sleeping dogs lie... if your 02 sensor was not working properly you would have a check engine light and poor performance
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Old 08-15-2006
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not nesseccarly a CEL but a drop in fuel economy and performance.
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