[sleeper_stang_2000]

I have a 100 shot of NOS Powershot with RPM/Fuel switch. I find that when I fill-up the bottle and put it to use the same day it works perfect. But when I try to spray like a week later is doesn't spray. It's behaves as if the bottle is closed (bogs the engine out when I activate the system). Could it be that I have to get a purge kit? The only way it works again is if I relieve the line pressure and reconnect it. Is there another way around this pain in the rear?