hello all hope someone can help
trying to get my Sierra ready for Ford Fair and i run in to a big big proplem and its not going to make
it was running fine in tuesday night done a free finishing touches bits of trim, light check for the mot all is good in the world

Tried to start it to take it for the MOT and is started missfiring and running badly and spluttered to a holt.
Checked all the leade fine and sparking replaced the coil just in case still the same

took the plugs out and they where wet with fuel, cleaned a refitted ... still failing to start or running badly

Any ideas