Contour Enthusiasts Group Archives Forums Modifications Forced Induction Zex Box

Hook jumper wires up to your solenoids manually just to test that they will operate correctly first. If they work fine when you hook them up manually to 12v, then check your ground/power wires.
Also, does the zex kit have a linear or a smoothing function? I wonder if it has a programmed curve like the Venom systems that smooths the onset of the nitrous shot by varying the duty cycle on the solenoids.

Sometimes bad relay contacts used to turn the solenoids on can cause the intermittent connection. I don't know much about the zex kit but it must have an internal relay or an external relay that may need a little cleaning or replacement.