I'm sorta new to the forums(I have been creepin on scionlife for awhile).
I bought the Zex nitrous kit and I'm having problems with the Nitrous Management Unit. I followed Blackmetal's DIY and hooked the white wire from the NMU to the brown TPS wire. After programming the switch I turn of the switch, turn it back on planning to push the pedal in again to see if it worked.

My problem is that when i turn the switch back on the solenoids go on and off uncontrollably. Do i need to find a better ground for the NMU? Thanks for any help you can give me in advance.

 

Any intermittent and/or rapid changes in actuation regardless of what solenoid or device you are using likely does things like this with a bad ground. Start there.