So... i am sure i should have posted for help before i started all this but here is the story:

I had my drivers side drop to the bumper stops twice over the past few weeks. Looking around online it sounded like that was a sign of a leaking air bag... the car is 15 and was never driven. When i did a soapy water test there did appear to be a leak in the diver side air bag.

I ordered a new set airbags off ebay - and installed them this morning.

Car Airs up to normal and off-road height no issue - but if i let the car sit both sides drop. It takes about 1 to 2 hours for it all to drop. I sprayed soapy water on everything - both air bags and the fittings, as well as the compressor, no sign of leaks.

Any thoughts on what i might want to check or do? I am doubly stumped why this is now happening on both sides...


Solution:

Issue was one of the replacement air shocks had a bad connection fitting. It is worth letting everyone know - both sides will drop if only one air shock is leaking. The side without the leak will not drop all the way to the stops - but it will drop from the full ride height.

 

Neither side will cause the other side to drop. Both sides dropping is nearly always a electrical issue, do you have any warning light on the dash?

 

No warning lights on the dash...

this is a full on mystery... i can't find anything definitive anywhere about what could cause this.

I have read valve block and compressor are all possible, if not a leak i can't find. I am hoping someone has fixed this issue before and can tell me before i start buying expensive parts.

 

I would go back to the connections on top of the air Springs.

You had no problems, aside from the driver's side spring, which you confirmed was leaking. Then you fitted 2 new ones and that's when your main problem started i.e. lose of suspension on both sides. It would be too much of a coincidence if a problem else where in the system was to occur just after fitting 2 springs.

Revisit the connections on each and disconnect them (by the way which connections do your new spring have, there are 2 types) make sure the air lines are in good condition with no marks or irregularities that would allow them to leak.

I had a similar problem with my D3. Even when I used soapy water I missed the leaks at the connections and started looking for other reasons. However, when I approached the problem logically I had to conclude that there was really only one place the leaks could be. So I did the test again and low and behold, there it was, slow but very definite leaks from the air spring. I fixed them by ensuring the air pipes were clean and smooth and once refitted the leaks were cured.

 

The plot thickens on this one...

after carefully looking over everything - i found there was a small leak on the driver side air shock connection. I resolved that and now we get on to the really strange stuff.

I can leave the car parked all DAY - like as of right now it has been parked since 10am this morning and it is now 315, the truck is still the same height as it was when I got out of it this morning. Not a bit of dropping.... However... since the replacement, i wake up to the driver side on the bumper stops, the passenger side has dropped a little but not to the stops.

So two questions

does the opposite side drop to help keep the car balanced if it thinks the car is leaning? does the valve block try to balance the two sides? I ask because the passenger side seems to drop a consistent distance, but never to the bumper stop.

Does anyone have a suggestion for what to do next? My thought was to pull the electrical connections at the valve block, so i can rule out the "computer" doing this dance. Good idea? Bad idea? other ideas?

 

i "believe" the passenger and driver sides are two separate circuits.

 

Look at the troubleshooting section here: https://www.landyzone.co.uk/land-rov...e-guide.61211/