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Old 01-07-2012, 01:53 PM   #1
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O2 Sensor. HELP!

So I picked up a new o2 sensor. I crawled under my TJ and I see one sensor directly in front of the muffler. However I see nothing to the rear of the muffler. So would this be the downstream sensor? I need to replace the upstream one.

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Old 01-07-2012, 02:00 PM   #2
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Upstream o2 sensor is just after the manifold before the catalytic converter

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Old 01-07-2012, 02:07 PM   #3
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I don't have much experience on exhaust systems as bad as that sounds. Is the manifold the big unit just past the muffler upstream?
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Old 01-07-2012, 02:25 PM   #4
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Front to rear: maniford (connected to the engine), catalytic converter, and finally the muffler
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Old 01-07-2012, 02:27 PM   #5
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Quote:
Originally Posted by Radioman
Front to rear: maniford (connected to the engine), catalytic converter, and finally the muffler
Thanks! That was pretty much exactly the type of description I needed. I'll give it a shot.
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