Well like the title says, its driving me nuts cuz i cant find any answers. I always thought a solenoid opened and closed, not constant clicking, but im new to the nitrous scene. Whenever i make the TB go WOT, the NMU (Zex's little box that houses the fuel/nitrous solenoids) makes a constant clicking sound. Does anyone have this kit (82023) or can tell me that this is NOT normal, or is? Thanks!