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  1. Diagnosing engine performance problems Cooper (non-S)

    First Generation Faults & Fixes
    I’ve had some sluggish engine performance problems and have resolved it (mostly) but it has taken a bit of trial and error. Since I read of few threads on this forum, I thought I’d share what I found in the hope that it helps someone else. I bought a 2002 R50 with 100K miles on it. Driving at...