Stalling problems for 1991 740 Volvo sedan

I have a 1991 volvo sedan. I am having problems stalling when it is wet outside. My

mechanic changed my distributer cap, but I

continue to have stalling problems in wet weather.

There are lots of ways for it to stall when wet, so…when it is dry and running well, take a water spray bottle and spray different components until it stalls.

Just do one at a time though.