phd40

I do have a 1.8 with these 'fabulous' individual coils over each plug. I currently get a shudder at around 18000-22000 revs and a lack of power. It is almost as if the car either wants more fuel or air. Ford say it is operating within parameters. I have looked at the plugs and I have NKG itr6f13 fitted, has anyone had faultly plugs of this model? or maybe even a faulty coil?

Many thanks for the replies guys. I do have a 1.8 with these 'fabulous' individual coils over each plug. I currently get a shudder at around 18000-22000 revs and a lack of power. It is almost as if the car either wants more fuel or air. Ford say it is operating within parameters. I have looked at the plugs and I have NKG itr6f13 fitted, has anyone had faultly plugs of this model? or maybe even a faulty coil?

I was just wondering if there is a Haynes manul for the focus C-Max. I want to change plugs, leads and coil pack and was looking for a guide.