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p0303 code

  1. PIzz

    New Members Area
    Hi, I own a 2009 smart car. It has 85000 miles and driven to work round trip 84 miles a day. My avg. speed driven is 70 miles per hour. I'm experiencing a rough idle and occasionally throw a P0303 code. I've reconditioned the fuel injectors, replaced #3 coil, performed compression test changed...