I don't know everything and won't claim too.
Solenoids are the meat of nitrous setup. Proper maintenance can be the life and death of and engine. It can stick open and send your motor parts into cyber space, or hang shut and kill the motor from all the extra gas it should be creating space for in the cylinder.
There are a few parts in a solenoid that need to have upkeep done on them for them to last and work at their best or inefficiency will rear it's head.. The onset of frustration is next, then removal and nitrous badmouthing starts...
Get to know your system..
You have in a typical solenoid these parts:
A Solenoid Cap Cover
Coil Wire Grommet
Plunger Housing/Coil Shaft
Plunger Housing/Base Oring
Plunger Solenoid Base
Simple mechanics will tell you how it works:
Nitrous enters the dual ports on the intake side and rest at the base of solenoid and inside the side around the plunger. The coils resistance and nitrous pressure keeps the plunger at rest. The second power is applied to the coil the magnetic field makes the plunger move in a upward position to open the pathway for nitrous to flow to the outlet side of the base..
Pulsing is the slow or rapid application of pulsing power to the solenoid's coil which creates a rapid field of push/pull of the plunger moving it up and down inside its housing.
Maintenance is something that is often overlooked in something that we depend on the most. We take for granted it's fine if it's making power, never really knowing if it is or isn't making all it can. Don't find comfort in guessing, do regular maintenance on it..Nitrous gets a bad rap for alot of reasons, and sometimes it's actually lack of knowledge and our own upkeep of the system.
Used Solenoids can be good and bad. Did previous owner do upkeep, how old is solenoid, how was it used, what kind of pressure was ran thru it, what kind of maintenance cycles did it go thru? Was it ever rebuilt?
I say these things cause buy used can be a $40 part to cause a $10k blowup... I usually don't buy used solenoids unless I installed it and know how it was kept up on.. I show you why from a solenoid I just purchased.
These are just a few pics of the solenoid before I ever get ready to clean it.. You have done it and I hope this deters you from here on out. If you buy used do the maintenance before you ever install it or you may wish you had.. Remember $40 only to blow $10k away..
This is what you may find and you don't know unless you do it.. I'm not pointing fingers but this could have been catastrophic to some of you that aren't really experienced in what to look for anyways..I suggest you grab some of the nitrous books out there and get your knowledge game on..The net is good for something but Knowledge is POWER.
Here you go and I hope this helps some of you:
I found a tiny pebble completely sealing one of the inlet ports inside the base
Trash inside the base of where the nitrous rest before plunger moves up
Light rust, grainy sediment and small piece of pebbles around plunger base
moisture particle buildup on top of plunger and inside spring and it's seat area
moisture/rust build up around top cover where coil sits at
plunger had moisture slime and some foreign matter in it's rail where nitrous would flow through to sort of balance the plunger in it's housing...
These are all things that could make this solenoid fail and take out lots of high dollar parts..
Invest in a good nitrous filter for your system. I filter from my big bottle to little bottle, and from my little bottle to my solenoids.
Buy good quality solenoids, do the maintenance and save yourself, tuner, mechanic and family grief...
I hope this has been a good read, helpful to those that didn't know and a refresher for those that have been lacking on doing it and wondering why they are having issues...