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prime

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  1. still running a rough, this was a gradual thing could this be bad fuel?
  2. hellow out there call me prime time, been having the same issue with my gmc going to try two new 02 sensers, there not very expensive. ive tryed new plugs same thing again, ilve tryed cleaning them same thing start up fine than start ideling rough. when on the hiway the check engine flashes but at idle it runs rough, check plsugs there black again on all banks but num..1 so ill try 02 sensors, let u know.. thanks.
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