when it rains car runs rough what causes this? on 2001 Ford Escort

when it even just damp out the car idles weird and wants to die it looses power and doesn't want to move it shakes and shutters violently trying to stay running when you try to rev thew engine it sounds like its going to backfire

2 answers 1 comment
I would start by replacing plug wires
ok thank you i'll try that and let you know if it works
yes plug wires