Spark Plugs

[ridway]

Hi folks

The gals developing a misfire which is slowly getting worse with time. Presently, and only occassionally under hard accelaration when the engine has been worked hard and very hot. If you slow down and drive carefully again it will be ok. It will still be ok if you then drive it hard again for a short time then it will return. I don't get any loss of power or excessive fuel consumption.

 

I suspect that the spark plugs are getting ready. I suspect they may never have been changed (79K!!) although I have a service history, there is no mention. How much is a set of plugs for the 2.3 and is there anything you need to be careful about when changing them? The plug leads seem fine and don't arc and spark when you watch them in the dark. The engine is generally very smooth, quiet and healthy. Any comments welcome.

 

Rich

[charles]

they are special platium type spark plugs (motocraft) and cost appr. eur 34 total for the 4 ones.

for changing you need a special pipewrench, because they are fitted very deep and very narrow into the cylinder head. see the haynes manual.

 

misfiring could also be caused by a defective ignition coil. I heard from others than on 2.3l they can break because of the heat.