Put it up in the technical part, but to no joy

Totally standard cossie, & it's misfiring to fooook

Its soaking number 1 & 3 plugs, ive changed the leads/plugs & the injectors around incase it was the injectors weeping, but it still doing it.

Could it be map sensor or cooling temp sensor

Any advise would be appricated as im hitting a brick wall now

Cheers