New to NO2... need some help.

[PKRWUD]

Unless you have it wired differently, it will spray everytime you hit the button, for as long as you hold the button, until it runs out.

In my opinion, the most important advice I could give you, is to only use it when you are at WOT. If your foot isn't on the floor, don't touch that button. Now, they make kits so that you can't turn it on until the throttle is at a predetermined point. Kit's like that only existed in sci-fi movies when I used nitrous, but are a great idea.

Take care,
-Chris