You'll need to take out all of the spark plug wires and dry the tubes out with a heat gun or hair dryer. Make sure that the wires themselves are all dry too, and aren't cracking down at the ends. If that doesn't clear it up, take off the distributor cap. What we commonly find is that an old, cracking cap gasket will let moisture in to the distributor and cause the spark to ground out. If you need a new cap gasket, let me know what year/model it is and I can send you one.


Kabuki