Hi wonder if anyone can help?
Basically the car seems to have a misfire every now and again, when idling it shakes slightly and gives a fudding kinda sound. I assumed it was a coil going and have since replaced 4 of them but I noticed when doing it there is a loudish metal tap noise on idle coming from the back middle chamber and when you touch the top of the coil you can feel a knocking on it, only seems to do it on the back middle one and slightly on the back left. Any ideas what this might be? I have taken the spark plug out and seems to be fine, no oil etc and was tight in the hole. The tapping noise is constant but the poor ideal comes and goes.
Basically the car seems to have a misfire every now and again, when idling it shakes slightly and gives a fudding kinda sound. I assumed it was a coil going and have since replaced 4 of them but I noticed when doing it there is a loudish metal tap noise on idle coming from the back middle chamber and when you touch the top of the coil you can feel a knocking on it, only seems to do it on the back middle one and slightly on the back left. Any ideas what this might be? I have taken the spark plug out and seems to be fine, no oil etc and was tight in the hole. The tapping noise is constant but the poor ideal comes and goes.