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Old 01-24-2013, 05:50 PM   #25
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Join Date: Jan 2012
Location: Nashville, Tennessee
Posts: 2,104
My Ride: 2002 330ci
could this simply be a vacuum leak. o2 is reading air in the system (reading a lean condition) ....reporting it to the adjusts the injectors to run rich. this extra air being down stream from the maf sensor could do that.
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