renault clio 172
I been doing a few bits to my new 172 which when bought was told it would have a new cambelt kit and dephaser pulley, well on start up it ildes abt 1000 -1100 rpm (is this normal) but does feel like it has a misfire which clears when revved i have checked the injector they working fine and its had new plugs and leads within 6 months i got receipt but if the cambelt wasnt done properly would this cause a misfire at ilde the car goes well pulls well just idles funnys anybody had this before