When I owned an old Metro I often had it tuned by a mobile engine tuner ( Crypton or similar). Plug and points gaps, carburation, timing etc were all checked and adjusted and the difference in all-round performance was quite noticeable.
Is there any point in having my Mk2 petrol Mondeo similarly tuned, or is this done automatically by the engine management system ?
Motorcraft, Hella or Ford are best quality for leads.
Try not to use the Halford specials (bright coloured, super floppy leads)
NGK plugs are good in Zetec.