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cold idle smooth rough
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  1. Engine Forum
    Dear Versa/Tiida Comrades, My 2011 1.8L 4speed automatic sedan has developed the habit of cold starting perfectly well and then: 1) idling smoothly around 1200 RPM for 20 seconds, 2) then idling VERY ROUGH, around 1000 RPM as if on 3 cylinders, for 20 seconds more or less, 3) then idling...
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