While trying to sort out why my compressor goes on and off, looking at the front and left valve percentages and gallery pressure , the percentages at the front are going from 0 percent to 100. While the pump runs .Would this be the front valve block at fault , at the same time the gallery is filled to 8_900 kpa probably psi and then when the pump stops the pressure drops again.
Yes I checked the pipes going into the block when I renewed a leak joint with push on repair at the front right strut, all checked with soapy water , perhaps there is an internal leak back to the mid block next to tank ? Can any one see where I'm coming from on this. The gallery pressure continually drops.
The rear corner valves aren't switching percentages.

Not really enough info there?
Is there another post with more info ?

What actual problem do you have.

Valve blocks are either open or closed, hence 0% or 100%

p.s. There is a 3rd cross over valve to link left and right in off road mode

Not sure what more I can say , or what might make it clearer.Basically the front is not rising. The compressor raises the pressure, then stops . Restarts when the gallery goes down to 300kpa , brings the pressure up againto around 8 to 900kpa, but no elevation of the front , what I'm trying to establish is , is the front block to blame or the block next to the pump.As I say the front corners start flashing 0_ 100 percent while the compressor is pumping , the rear doesn't do this they are extended and stay there. After a day or two they have come down now to about half their height. Not in this fault , I'm guessing.Hope that helps you to understand yhesituation

Trying to edit last post so apologies, the phone is not working for me !

Trying to edit last post so apologies, the phone is not working for me !

The computer raises / prioritises the rear first.

If the front won’t raise fully this can be a sign the compressor is worn

The disco forum will provide more help.

Try the key programming trick in the video, right at the bottom of this page

https://www.disco3.co.uk/forum/another-sus...00912.html

If you hear the front valve block clicking, it means it’s probably ok

I have just renewed the drier filter , exhaust solenoid and seals and it pumps up to about 900 kpa/130psi.
Given that , I'm not sure what the max pressure should be but doing the calibration a day ago the rear shot up no problem , could have been tank reserve I suppose.but only a day ago I have had the front raised on Menu - Calibration, guided. Now it refuses that .
Really appreciated your input and help here , I post a lot on here and I know every one has busy lives , so I get on with it best I can , so again appreciate your help Andy K.

Last edited by alfapat on Tue Jul 05 2022 7:24am. Edited 1 time in total

Ok , something to try thanks.

I'm not sure how that key programming helps me , I will try it any way.

I went into live values and Test Valves on GAP11D . Each corner started the compressor but only the rear went up . Although I sure on a short press the valve is clicking on something , Its maybe needing stripped. I think if I seek a second hand one , I will try that.
Tested around the compressor while running but no leaks ....Phew.

The compressor ran up to 1300 kpa so no problem there, on the GAP DIAG THE COMPRESSOR Gallery showed the high figure then when it stops it then show about 300kpa , not sure why that is but pressure is released somewhere as it drops .
Moving on , spent all day looking for and repairing a leak. The push on couplings I bought were leaking , well one of them which I fitted to the top of the airbag, but unfortunately it was compromised by the pipe while fitting. Very tight up there! I t is all back together and working a tiny bit better with a new valve which was checked for leaks before assembling the whole lot back together. The compressor is still coming on too frequently. I am going to pull the fuse for ride control overnight and see if any one side of the front axle still goes down , I am not sure if its still air thats causing it as in physical loss and the drivers front can never be raised to the same height as the nearside , unless you raise the whole lot to full height off road and drop it to correct one . Will see in the morning.

So the front has dropped by about 30 to 40 cm,They have stayed unequal as well.\i dont know , is it leaks , probably . Espacially if the pump keeps bringing the pressure up. So if I have pulled the fuse , can I assume that its ether the front valve block or sensor after ruling out my new plumbing when fixing leaks.

I have just taken F26 out over 24hrs at full height and the front only has dropped 20mm each. Can I assume that the front valve block is defective.

Well the front block could do with new seals which are about £20 off eBay.

Thanks Andy , just wanted a nod to track in the right direction, worth a try anyway. Ordered !
The car has sat 24hrs and does show a slight change.To add :
FROff 465 a drop of 20mm
FRNr 495 a drop of 20mm
ROff 495 the same
RNr 530 the same

Looks like a leak on yellow line coming back from front block.