Hi again,

Drilling the exhaust silencer sorted some of the issues with the suspension but the compressor still runs a bit much. Yesterday I received my IID tool and started doing testing on the operation and pressure. First thing I noticed is that the gallery pressure is slowly dropping whenever the compressor is not running. The car is always level even after sitting a few days so I assume the air springs are all ok.

Where would the most obvious places be for leaks if not the air springs? Reservoir, connections or inside the compressor like the exhaust valve?

Also, sometimes the compressor is running up to 900kPa and sometimes closer to 1500kPa. After stopping the pressure drops back to about 280kPa. Is this normal?