stuttering problem

[graeme68]

hi there i am looking for some help when i put my foot down my ford focus st starts to spluter like mad and when you lift it stops does anyone have any ideas please

[andy-xr]

Air leak?

[focusboy]

coil pack? broken lead? poss a number of things

[graeme68]

thanks for the info i will start with some leads and take it from there

[welshshaney]

Hi its most likely coil pack it happened to me last week common fault on focus cost me £153 new coil pack leads and plugs