ok, taking matters in my own hands for the mo.

ive removed the second spark plug (left towards right) and the tip is black, in the haynes it says that is CARBON FOULING.

BUT number 3 is light black and wet with petrol.

is this how number 3 should be?? this is the one with the misfire!!!

 

poss a weak spark or the injecter is weeping swap the spark plugs about and c if no3 bore is still the same also swap the injecters over and c if the problem then changes to the swapped injecter
if that make sense lol