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look at your O2 content. at 15mph you have high O2 at .07%. This indicates you have an exhaust leak. If you have an exhaust leak the BPT may not close the vaccum vent since there is not enough back pressure in the exhuast or the oxygen is coming in before the cat and flooding it with O2 preventing it from doing its job. In the later case I would think your other numbers would be a bit higher since it may screw with the O2 sensor. Try to find your exhaust leak.
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Smoke and Fire 
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