Whenever my A/C is on i occasionally (every few minutes) get a little water shot into my passenger side floorboard (just got THIS miata a few days ago) it's obviously got something to do with the A/c's drain system but anywhere in particular i should check before i rip the dash apart?

 

I remember deplugging the drain on mine when I first got it...but can't remember where the drain is specifically.

If you do a search over on miata dot net, I'm betting you'll find out where it is.

 

the hose goes to the transmission tunnel near the firewall/ecu area. you cant miss it.

 

Ditto. Pull up the passenger carpet under the glovebox and you'll see a tube running from the AC unit behind the glovebox towards the center of the car directed towards the transmission. That drain tube is blocked with leaves and stuff.

 

coat hanger is your best friend.