Front O2 sensor switches rich-lean about 30 times for every one switch of the rear, as long as the cat's working properly. If you just remove the cat and were to leave the EM stock and O2 sensors in place, then the front and rear sensors will effectively see the SAME switching ratio, which tells the ECU that everything's gone wrong!
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"...these condoms have a topical anesthetic to reduce sensitivity, so you can last longer. What a paradox. You can't feel a thing, but you can f*ck for HOURS..."
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