stalling when it rains on 2001 Volkswagen Jetta

the car wont start after it rains, there is a crack on the air filter cover,

Asked by for the 2001 Volkswagen Jetta
1 answer
I'd check the ignition system, especially the sparkplug wires. I'd also get the air filter cover replaced so the air filter can do it's job.
Here's a directory link for you: