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8:12 am
November 2, 2011
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FMFTJ
| | Mundelein | |
| Grocery Getter | posts 10 | |
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Has anybody ran into MPG decreasing do to O2 sensors failing, if so have you expierienced any other symptoms/
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5:43 pm
November 2, 2011
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Moparboy
| | DDO West Chapter Reaper Crew | |
| Rock Crawler | posts 1960 | 
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Not sure if this works with the TJ side of Jeep but with my 98 XJ (4.0L), I had a upper O2 sensor go bad and it would run very rich. It would also clog the cat up. Funny story, we were at the Badlands last year, I believe it was for the Halloween Run and with the bad o2 sensor and the clogging cat the XJ would dump out black smoke, kind of like a diesel. It was pretty fun. I would recommend replacing both of them at the same time.
Evans 
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Evans
DDO West chapter (Reaper Crew)
1999 Jeep Cherokee-Trail Rig
I Love Haters
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8:18 pm
November 2, 2011
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FMFTJ
| | Mundelein | |
| Grocery Getter | posts 10 | |
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awsome thanks for the imput.
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4:43 am
November 3, 2011
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StinkyMud
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| Mall Crawler | posts 346 |
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To add to this, I'd get myslef an 02 sensor socket. It has a cut out for the wire. It will help prevent you from having to go buy another sensor due to screwing up the wire. Don't ask how I know. =/
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Jeff & Angel "Git-R-Done"
04 TJ (Lil Smokey)
02 KJ – DD
01 Escape – DD
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1:11 pm
November 3, 2011
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FMFTJ
| | Mundelein | |
| Grocery Getter | posts 10 | |
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