Thread: Air Suspension

Originally Posted by Andrew67

Thank you Graeme,

Will have a go at rebuilding the original with the dryer, dessicant and seals from the new one

Andrew

Buy a new kit, i wouldn't trust re-using parts off the cheapy.

Originally Posted by loanrangie

Buy a new kit, i wouldn't trust re-using parts off the cheapy.

Agreed, Broke each one down and have started replacing critical parts, on the new cheapy the dryer o ring was already broken up, its was a nasty o ring. Not sure why they cut corners on something so cheap !! anyway good to break it down and see how they are made up. I may get a decent emergency spare out of it, could be handy for me or a fellow D3/4 traveller.

I bit the bullet and bought the real deal from Roverlord and it's on its way along with a very obscure hose I damaged getting the cheapo out !!

I've said it once and will say it again ! Mario is the man. He tracked down what I needed and is getting them express posted to me. I know if I had spoken to him before buying the cheapo compressor he would have told me not to do it, lesson learned.

Anyway I'm enjoying pulling them apart and seeing how they tick, $350 jigsaw puzzle : )

If it is needed, I have a new amk compressor for sale with the upgraded hose kit. Feel free to PM me.

Originally Posted by Tommy Armstrong

If it is needed, I have a new amk compressor for sale with the upgraded hose kit. Feel free to PM me.

Will PM YOU when I can work out how to do it 😂😂😂😂

All good. I was on the mobile app which didn’t have all the functionality 🙄👍

Ok well I'm pulling my hair out here with this suspension issue,

Got to Alice Springs on Normal Height after pulling the fuse. Got red and amber lights at Barkly Homestead,

Replaced the compressor with New Dunlop compressor and new relay no change it just continued to run. Did the overnight test and saw the front left corner drop.

Got diagnostic test from Land rover and no leak in the airline but confirmed the front left airbag has leak, they made sure the software was upto date for the compressor.

Replaced the front air bag and still the compressor keeps running. Very eratic kpa pressure when viewed in the live values on my GAP tool. Gallery pressure hovers in the high 400kpa then plummets to 250kpa and fires up the compressor, repeat and repeat again : ( pressure gets up to 1700kpa then the compressor shuts down, kpa drops and the process starts all over again

When I pull up and turn off ignition the compressor continues short vents every 15/20 seconds or so for a while till the car drops down on the left side

I've taken out the reservoir and water tested it for leaks pumped about 100psi into it but nothing, it looks reasonably new.

Replaced the reservoir valve block and all the voss connectors,

The compressor is brand new

The front left air bag is brand new

First Suspension fault which has now gone,

• C1130-66 (6C) Air spring air supply - Algorithm based failure - signal has too many transitions/events
  ( on 24-08-2021 11:28:30 at 188542 km )

Latest fault today is "Pressure not reducing when venting gallery"

Any pointers would be very much appreciated before said D3 end its life in a very deep quarry : )

Originally Posted by Andrew67

When I pull up and turn off ignition the compressor continues short vents every 15/20 seconds or so for a while till the car drops down on the left side

I would test again with the 20A fuse removed but remove it before switching off the ignition (ie prevent the suspension ecu from opening any valves) to determine if there is a leak or if the suspension ecu is making a height adjustment.

What's the fault code for the pressure not reducing when venting gallery?

Edit: I found the code. Check that the pipe from the reservoir valve haven't been transposed.

C1A1364 Pressure Does Not Decrease When Venting Gallery
Exhaust valve stuck closed
Exhaust valve does not hold minimum retention pressure
Gallery pipe blocked/damaged
Pressure sensor fault
Air suspension exhaust silencer blocked/restricted
Air suspension exhaust pipe blocked/damaged
Reservoir valve block pipes incorrectly installed (unions reversed)
Refer to the guided diagnostic routine for this code on the
approved diagnostic system. Check the Air suspension exhaust
pipe and silencer for blockage/restriction. Check the reservoir
valve block pipes for correct routing and installation.

Originally Posted by Graeme

I would test again with the 20A fuse removed but remove it before switching off the ignition (ie prevent the suspension ecu from opening any valves) to determine if there is a leak or if the suspension ecu is making a height adjustment.

What's the fault code for the pressure not reducing when venting gallery?

Edit: I found the code. Check that the pipe from the reservoir valve haven't been transposed.

C1A1364 Pressure Does Not Decrease When Venting Gallery
Exhaust valve stuck closed
Exhaust valve does not hold minimum retention pressure
Gallery pipe blocked/damaged
Pressure sensor fault
Air suspension exhaust silencer blocked/restricted
Air suspension exhaust pipe blocked/damaged
Reservoir valve block pipes incorrectly installed (unions reversed)
Refer to the guided diagnostic routine for this code on the
approved diagnostic system. Check the Air suspension exhaust
pipe and silencer for blockage/restriction. Check the reservoir
valve block pipes for correct routing and installation.

I have removed the air filter and checked pipe for any signs of wear and its good with no blockage. The air filter foam was basically rotten and crumbling so I will source a new filter. However I don't think it would have got past the cloth filter at the bottom.

Having a spot of trouble removing the air intake silencer as I would like to check for contamination, seemed reasonably straight forward however what looks to be the petrol overflow container is restricting pulling the silencer out ? do I need to remove/disconnect this overflow container to remove the silencer ? Thank you : )

Sorry, I'm of no help there. I don't recall seeing my now-gone D4's silencer although I expect that I did and the workshop manual doesn't say where it is mounted, let alone on what has to be removed to extract it.