Well, sort of good news....!!
Ran car, raised it to standard height........switched off, waited 5 minutes, removed exhuast.....No air at all coming out. So NRV ok right?
Also this morning, hit standard height and up she went, straight away!!!
Went around with the soap.........no leaks anywhere....(that I could see).
So, just for interest.....when I raise to standard height....pump comes on for 15 seconds, clicks off.....valve clicks a bit front moves around abit....pump clicks on longer, clicks off.....front dances a little more, pump clicks on for a while...then clicks off. On flat ground.
I suspected that I had two issues, an air leak on the storage side (as Wammers has said, and I agree....but can't seem to find it, and today not presenting itself at all!!) and the dance, dancing and a tiny lift with pump running after a rise to height (air bags are NOT leaking).
Anyways, front sensors on order....may eliminate the dance....as my sensors are 12 years old and one did have a fault until I swopped it over.
The saga continues.......
They do dance.
If you fitted the gauge as grit-valve and I said you can see whats going on in regards to fill tank, leaks etc.
My pump doesn't run continuously to fill tank but takes a breather now and then.
Sounds like you lower the car on exit and therefore the pump always have to work a fair bit filling tank on entry when you hit buttons.