Quote:
Originally Posted by tim
Even a slight leak before the O2 sensor would cause a false reading. All that air flowing by would be sucking more in from the outside. I had a similar problem on a completely different vehicle where the there was a leak before the O2 sensor and it caused some very poor driveability. I am not saying that is is for sure the problem but even the slightest exhaust leak before the O2 sensor can and probably will cause problems.
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Shit half the DSMs on here probably have the same leak you are describing. I don't think that was or is his problem. But who knows.