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Jeep Forums: YJ Wrangler Technical Forum   08-04-2011, 07:40 AM
Replies: 63
Views: 4,528
Posted By notmyj
No. Having it hooked up and not in the exhaust...

No. Having it hooked up and not in the exhaust stream wont do a damn thing. The o2 sensor reads the amount of oxygen in the exhaust and the computer uses this reading to tune the engine as you drive....
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