Greetings to the forum.
Recently, on youtube, I saw some videos where the cleaning of the diesel injectors was done. In particular, once the injector was extracted and placed on the bench, it was connected to a power supply with the voltage provided for that specific injector and then, to clean it internally, a specific liquid was passed inside the injector.
So, recently I also took out the injectors of my 2008 FL 2 TD4 and I wanted to try putting them on the bench to clean them internally. I tried to give the correct voltage, which is then 5 V, but nothing. I have not heard any injector activate.
Could you tell me what procedure you need to take to activate and clean them once they are extracted and placed on the counter?
Thanks to all who will answer me.
M.

They are piezo injectors and you need approximately 120V to open them. And the current must flow in both directions, for opening and closing, otherwise they will remain open.
This is why is dangerous, with the piezo injectors, to remove the electric connector, while the engine is running, to verify if the injector is working or not.
In certain cases they can remain open and then... ruined cylinder/engine or worse.
So no, you can't open them as you've done it, like with the old, electromagnetic injectors, at least not at those voltages you've used.
You need 120+ volts, at peak currents of 8+ amps. Danger zone... be careful.
See more info here: https://www.freel2.com/gallery/albums/user...ectors.pdf

Use Wynns diesel system purge. https://www.wynns.eu/product/diesel-system-purge/
You need to make the engine use only the liquid in the bottle. Do no pour in the tank.
They say that you need a special machine, but the idea is to use some hoses to suck from the bottle and then return the surplus also in the bottle.
Run the engine until the 1 liter bottle is empty.
Much easier in this way than what you want to do.

Alex, that is a deviously wonderful procedure. I can hardly wait to try it. MY11 SD4 SE Auto

I must add that they need 10 bar pressure to open and close as well, thats why return pressure is controlled and the reason its dangerous to crack a pipe whilst running to check for pressure.
2nd its extremely detrimental to lay an injector on its side or on a bench, including just the dust in the atmosphere or from a rag could actually enter an injector and cause it to seize. Once they have been in an engine and run they must always remain upright ! otherwise any microscopic particles and travel up or down the injector fouling the moving valves Jaguar x-type sport gone
Jaguar x-type 2.2d sport one of my best cars ever sadly gone
Freelander 2 GS auto 2008 most unreliable ever ! gladly gone
Freelander 2 GS manual 2013 only time will tell !

I am also very curious to try the purge system on my injectors as well, as I also suspect an issue on them, but I was reluctant to try this method on my own, without seeing some instructions. I remember reading a while ago that Alex tried it directly on the tank, but this will normally not have the same results.
So if someone does it (@ozzjeff62), some feedback would be greatly appreciated. I was rather cautious on getting air into the fuel system when connecting / disconnecting the pipes, my understanding was this would be a problem.
Here's a video on the procedure done on an Audi:

I did something similar to what Alex has suggested.
Only difference being I emptied the fuel filter then refilled with the diesel purge via the inlet connection on the filter.
Worked fine for me.  Now at the point when I learn something new something old is lost out the other side !
Now retired so it doesn't matter anymore.
Freelander now gone.

We used to have a lot of problems with the progressive stages of some diesel injectors on Peugeot/Citroen HDi's

The fix was run the engine until hot,( as hot as we could get ) drain the fuel filter, fill filter with diesel injector magic, another one in the fuel tanks, start & run for 40 seconds and switch off.

The concentrated cleaner used to sit in hot injectors left overnight and then start up in the morning and drive.
used to fix about 90% of the diesel issues. Jaguar x-type sport gone
Jaguar x-type 2.2d sport one of my best cars ever sadly gone
Freelander 2 GS auto 2008 most unreliable ever ! gladly gone
Freelander 2 GS manual 2013 only time will tell !

oldgeezer wrote:

I must add that they need 10 bar pressure to open and close as well, thats why return pressure is controlled and the reason its dangerous to crack a pipe whilst running to check for pressure.
2nd its extremely detrimental to lay an injector on its side or on a bench, including just the dust in the atmosphere or from a rag could actually enter an injector and cause it to seize. Once they have been in an engine and run they must always remain upright ! otherwise any microscopic particles and travel up or down the injector fouling the moving valves

alex_pescaru wrote:

See more info here: https://www.freel2.com/gallery/albums/user...ectors.pdf

Iepulere2 wrote:

I am also very curious to try the purge system on my injectors as well, as I also suspect an issue on them, but I was reluctant to try this method on my own, without seeing some instructions. I remember reading a while ago that Alex tried it directly on the tank, but this will normally not have the same results.
So if someone does it (@ozzjeff62), some feedback would be greatly appreciated. I was rather cautious on getting air into the fuel system when connecting / disconnecting the pipes, my understanding was this would be a problem.
Here's a video on the procedure done on an Audi:

Iepulere2 wrote:

I am also very curious to try the purge system on my injectors as well, as I also suspect an issue on them, but I was reluctant to try this method on my own, without seeing some instructions. I remember reading a while ago that Alex tried it directly on the tank, but this will normally not have the same results.
So if someone does it (@ozzjeff62), some feedback would be greatly appreciated. I was rather cautious on getting air into the fuel system when connecting / disconnecting the pipes, my understanding was this would be a problem.
Here's a video on the procedure done on an Audi:

The cleaning liquid is a fuel and the engine is running on it.
The formula is in fact kerosene with a cetane enhancer.
A lamp oil, no more, no less.

The connection schematic below.
The loopback on the car's fuel filter is made because on this car (the one on the video) there is a delivery fuel pump in tank for lifting the fuel to the engine.
No need on FL2. But doesn't hurt if you put it.

Thank you. Soon I try to clean the injectors with this scheme. It must be cool.

tascusi wrote:

Iepulere2 wrote:

I am also very curious to try the purge system on my injectors as well, as I also suspect an issue on them, but I was reluctant to try this method on my own, without seeing some instructions. I remember reading a while ago that Alex tried it directly on the tank, but this will normally not have the same results.
So if someone does it (@ozzjeff62), some feedback would be greatly appreciated. I was rather cautious on getting air into the fuel system when connecting / disconnecting the pipes, my understanding was this would be a problem.
Here's a video on the procedure done on an Audi:

If I have not misunderstood, in the video the connection on the diesel filter is made. The delivery from the tank and the return of the diesel fuel, which is not normally burned by the injectors, is connected with a closed circuit.
Then a plastic bottle is filled with the injector cleaning liquid and two pipes are connected on the diesel filter. A tube that starts from the bottle and goes to the injectors, passing through the diesel filter.
Another tube, with a small filter, goes inside the plastic bottle and brings the cleaning liquid that is not burned back into the bottle itself, thus creating a closed circuit. The engine runs until the cleaning fluid is used up.

This system, however, raises a question to me: does the cleaning liquid, when it enters the combustion chamber, damage the engine?

I've recommended one in the second post in this thread, just after your initial post...