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New CEL codes after Test pipe install

I had a random misfire because the flange on the test pipe was not seated properly on the headers. allowing outside air to hit the sensor -B1S1. The sensor reads

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Old 08-05-2015, 01:49 PM   #7 (permalink)
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I had a random misfire because the flange on the test pipe was not seated properly on the headers. allowing outside air to hit the sensor -B1S1. The sensor reads lean, dumps fuel to compensate, this causes the ecm to pop a misfire code.

After I fixed the leak, the code cleared itself on the 3rd startup.
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