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Rough when cold

Car  clio 172
I have not long had a 2002 clio 172, but its started running really rough when its cold (as if its mis-firing) and when its sat idling its not smooth. Anyone got any ideas???
 
Its normal mate. They are all lumpy and hesitant when cold, something to do with emmissions I think.

Even when warm the idle will be lumpy to an extent... ie you can feel it, but the rev counter doesnt move.

Dont worry about it...
 
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