ok, 2011 LR4 front air suspension was lowering overnight. I pulled the fuse and both front sides still dropping overnight. I replaced the front block and it was much better but still lowering a bit and worse on the left. I pulled the fuse again and let is sit overnight. only left side dropped. I figured it was a leaking bag as they appear to be the originals. I replaced the left bag. Car is still dropping an inch or so overnight on the left side. I have sprayed soapy water on the air line connections to the block and the strut with no bubbles. it is driving me nuts and i dont want to finish off my compressor which is already getting a bit noisy. Anyhow, has anyone introduced UV dye to the lines to look for leaks? I was thinking about disconnecting the line to the front block that goes to the lef front bag and putting in a small amount of UV due then reconnecting and running it for a few days and using a UV light to look for leaking dye. Only concern is introducing a substance into the system that is not dry.

Thoughts?

 

ok, update. Found the issue. Someone has previously spliced the line from the mid block to the front block in a place where i could not see it. Fairy soap happened to run down the line from my spraying it on the front block voss connectors and i by chance saw some bubbles forming about 2 feet down that line behind the front bumper cover. It appears to have been spliced with a brass double nut compression type thing. I have orderd a proper splice and some new tubing to correct.