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hydrocarbons

  1. M3 Failing California Smog at low mileage**

    ///M3 Forum
    I never post, but this is a juicy one I really want to get out there. So I'm trying to register my '04 in California for the first time with 46,000 miles on the odometer. But I can't because she's blowing too many hydrocarbons. 71 PPM to be exact. I tried race fuel and injector cleaner and the...
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