I just noticed this weekend that when I have the nitrous on it will engage when the throttle is pressed about 3/4 of the way down. Then from a dead stop, window switch set to 3200, it doesn't seem to spray until about 4,000 rpms. I am thinking I need to recalibrate the NU and window switch. Zex's instruction are a little confusing on the process. Anyone have any tips for me on this?