Stalling FTO

I wonder if anyone can help me ..... :naughty:

I have slight problem my FTO, I have a 1995 2.0 V6 MIVEC FTO GPX.
I had the Stepper Motor replaced due to idle messing around ..this seems to have fixed the problem I was having at then time

but I have another problem now ...when the car is wet it stalls.. it will drive and start fine .... but when I come to a stop it will stall ...but only when it is wet.
do you have any suggestions or have you heard about this problem before.

I own a 97 FTO. It's got me buggered. I'd check your air filter housing. perhaps your taking on water???????? It sounds as if the water is getting in somewhere it shouldn't. Check your leads, plugs, filters etc.