This is sounding expensive to me but I can but live in hope someone has an idea.....
Engine has historically been as smooth as silk but recently and gradually it has been running a bit rough and lumpy.....tick over there is a misfire maybe 1 or 2 cylinders (that is what it feels like) but difficult to tell. On acceleration you can feel a lumpiness to the engine and under hard load at about 3500 rpm the vibration from the engine is really noticeable, feels like it is on about 4 cylinders!!!
I have so far changed plugs and leads but no real difference...all plugs were the correct grey/light brown colour and all have been firing.
There is no unusual ticking or knocking noises from the engine and wonder if it could be a fuelling issue?
I feel I may have to put it into my local agent for diagnosis but thought I would ask here first......
Regards
AlunP