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Old 06-28-2013, 08:18 AM   #7
cowman79
 
Join Date: May 2013
Vehicle: 1996 Mustang GT
Location: Kentucky
Posts: 11
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Quote:
Originally Posted by art02gt View Post
rear o2 sensors only monitor cat efficiency and have nothing to do with the engine running rich or lean. you have a rich condition which means you either have too much fuel or not enough air. I wouldn't throw parts at it yet, the first thing I would do is check for vacuum leaks (pcv hoses, intake gaskets etc.).
If I have a rich condition then why isnt the bank one sensor 1 showing a high reading. If both sensors are in the same gas stream then wouldnt they both have similiar readings.
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