I have a '98 Honda Accord that occasionally won't start in wet weather until I spray the spark plug wires and cap with WD40. I replaced the spark plug wires but it's still doing it. This only happens sometimes and it cannot be predicted which paricular damp day it will not start on. What other part might it be??? Thanks

 

Replaced the wires? But what about the distributor cap?

 

Are your plugs wet with gas?

 

Distributor rotor can also crack and short the spark to ground via the distributor shaft. New Cap and Rotor is inexpensive and will likely cure your problem.

good luck