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  1. Intermittent lumpy running

    9-5 Workshop
    Hi Sorry for the non-technical description! I have a 2009 1.9TiD. I've been having a very intermittent (approx. once a month) spate of... lumpiness (for want of a better description). For a few hundred yards the engine seems lumpy and reluctant to pull, then it sorts itself out and is...