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  1. Focus ST EcoBoost Performance (2013-Current)
    Focus st 2013 2.0 ecoboost 110,000 miles Hi, I have a engine management light on what says I'm running rich in bank 1 02 sensor so I had that replaced with no change in em light or symptoms, which are - smells strongly of fuel from the exhaust, the car idles erratically hunting or surging and...
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