[Bassasasin]

Wow!
Stay dry and check it dry.. Some of these get wet and fail.

I think the ignition module can be checked at a parts outlet.
But I would suspect another area as the problem if it runs bad dry.
Some have taken them off and heated them up with a blow dryer or something that gets it fairly warm.

Do you know which cylinders it's not running on?..
Could it be the injectors?..
Could it be the wires?
When you checked the plugs did read them and did they tell you which one isn't firing?
And of course it still could be a plug.

Good Luck