I have a 98 Mondeo and although the idle revs are correct the engine sounds a little heavier than normal. As a result I think I should change the plugs & leads. Should I go for Ford parts or third party parts? I've been told that NGK plugs are the onbes to go for, and possiblt Splitfire leads - does anyone know how much these would cost vs Ford parts?
Also been told to change the rubber t-piece as this solve the idle problem - where abouts is this located? I'm a novice but been told that its a 30-sec job to pull it out and push in the new piece?
Cheers