What makes you think it's a diesel @Malscull? never seen one with coil packs and spark plugs!! Spent hours tuning SU's, Webers etc. but not so sure they were fitted to 2002 'S'Types @Chidders that's not to say you might not have a leak in the petrol feed somewhere, very often at a 'union' connection to the injector array. Advice re torch etc. very sound @Nichole !!!
S