you arse Rosscock!! if its idling poorly.. make sure its not the little square box thing to the left hand side of the engine bay, only a small 3cm squared box, and has a little pipe that leads to the inlet mani... if its not connected it could be that, i removed mine once and put it back in a while after and it idled like shit.. i hadnt connected the little pipe but it took me ages of looking to find why lol