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Can i move the o2 sensors in front of the cats so all 4 o2 sensors are in front of the cats?
Wiki User
∙ 16y ago
That will not give your computer the correct readings for emissions or tuning. The pre cat O2 sensors record hydrocarbon levels that are compared to the post cat levels to determine emissions efficiency and to adjust fuel/air ratios for operation. There should be a significant drop in hydrocarbon levels between the two showing that the cat is operating correctly. If your aim is to eliminate the cats I cannot tell you if your performance will be affected, your check engine light may come on and stay on making it impossible to get emission certified.
Wiki User
∙ 16y ago
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Changed all oxygen sensors on 1997 ford explorer but still reading samething?
Don't know what your original reading was, but the O2 sensors before the cats moniter how the engine is running and the O2 sensors after the cats moniter how the cats are performing.
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a stationary front,but it will sometime move eventually.
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Do cat walk?
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These are all potentiometers
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