Hi all C2 1.4 petrol 05 Idle is lumpy but fine when driving, thought i would check connectors etc and found one which is broken and i have no idea what it is. looking down at engine in front of injectors rh side next to the head (top right corner near enough) theres a stud sticking up with an eye terminal attached first then on top another eye woth a black connector attached to it????? It has broken of leaving to prongs sticking out i wonder if i can solder the wire direct to it or is the block important.