Can anyone tell me if I need to be concerned about my Signum 1.9 cdti 150 54 plate, When I start up from cold it ticks over quite lumpy for while then it is fine , ticks over smooth when I have only driven about 1 mile or so, when cold it doesn't drive lumpy just on tick over about 750 - 800 rpm. My warranty runs out 1st Sept 07 so would take it in to get check out if you think there might be a problem??

Mark