thanks for the help m8 , but i do have to ask.. it says in my haines manual that the SP gap is 1.0mm or .039thou what makes u say its 1.6 iam only asking because thisafternoon i changed the plugs there were 3 motorcraft ones that wernt even the right sort for an escort zetec and there was 1 ngk in good nick so i bought 3 more checked the gap to 1.00mm now the car runs ok but its got no power whatsoever thru the gears and sumtimes on idle it DROPS to 500 then UP to say a 1500 then back down till nearly stalling and it does this untill i either turn it off and on or rev the car. its realy pissing me off now ive spent 850 on car 575 on knew valves etc and now more money its just starting to take the pisss lol :@:@ any help with the bloody problem ov mine is much appriciated thanks for any help ive been given too