clio 1.8 16v
hi,my clio 1.8 16v stars first time when its cold and drives fine! but as she warms up she starts to judder(ocasionally) as if shes running out of fuel,eventually it will cut out and then takes ages to start back up,it also got a bit af black soot around the tail pipe(unburnt fuel),does any one know what the problem is please? thanx