Dude, I'm using the 3 quart container it came with. Check to make sure it's not injecting while you're idling or at a lower percentage. I'm not familiar with Stage II... is that reading the MAF sensor? My injection starts at 20% pulse width ( reading the injector ) and is full spray at 75%. I've had to dial the "start" up so I wouldn't inject while taking road trips and cruising at 80 mph. I don't read boost because it's not as consistent, but these are all settings that I can program with the Stage III controller.