Check the obviousley stupid basics first, like connections and fuses

then

measure resistance of king lead,

also king lead will only fire once, to discharge the coil, then it will charge again this can be confusing mate, use one of the plug leads instead

try it again once cold incase sensor breaking down when warm/hot

has it been mapped for new application?
maby fueling is miles out.

feel free to PM me matey, or gimme a ring.

Sean.