Thread: Suspension diagnosis and GAP IIDTool

Step 1 for me would be to read the faults, and clear them. Almost always revives whatever is ‘failing’

Thanks Michael,

I was hoping that may have been the case early in process but unfortunately no change.

Looks like compressor is first thing to address as still weak after replacing piston ring, When cold it brings reservoir pressure up to 190 with door open. Close door and pressure drops as car tries to level and from then on diminishing pressure and rapidly increasing compressor temperatures. I will source some connectors tomorrow so I can supply air from another source and see what impact that has on situation.

Charles

I doubt any of these things have an extended "duty cycle". Hence the reason for Bagpipe Andy..I dont know what line pressure these things are supposed to create in a L322,, I can tell you it takes around 70-80lb to lift the rear of a D2.

Had this lying around. Dunno if it helps.

( link takes you to a pdf. My settings means it downloads. Yours may differ. It's only one page, covers pressures)

Thanks Pedro and Tins. I have been away from computers, so apologies for delayed response. Following further research and testing I am comfortable with the compressor output at 190psi max even though that is below the stated specs. I rebuilt the main and crosslink valves with kit from 4x4 airseals and whilst there was no apparent wear, there was moisture present. The compressor rebuild should have fixed that, although interestingly; the old desiccant was not solidified/clumped together.

To cut a long story short, I now have vehicle raising itself. It was late last night and took manually calibrating height using GAP Tool, however front had dropped again overnight. This was not surprising as when front lifted I could hear air escaping and feel it bleeding out through base of airbag support - see red circled area in image below (not my strut - borrowed from internet). I expect this indicates failure of air bag and/or the large sealing O rings?

Airbag.jpg

Thanks,

Charles