Member Since: 26 Oct 2013
Location: Liverpool
Posts: 690
Suspension saga continues...
I replaced the 2nd knackered Hitachi compressor with one of AdvancedFactors' new Arnot kits today (see here - https://www.advancedfactors.co.uk/p-2645-a...930-p.asp) Aside from slight confusion at the new kit having 1 less air hose than the others (it doesn't appear to use the exhaust pipe) the fitment was pretty straight forward, and certainly a lot easier than the Hitachi version.
Thankfully, the persistent C1B21 fault relating to the compressor has now cleared, and after a quick recallibration of the height it all appears to work better.
However, I'm still getting "Vehicle Rising Slowly" messages and the compressor is running constantly. The reservoir doesn't seem to hold the pressure correctly (its only 6months old so hopefully not leaking!)
I'm assuming I've got a leak somewhere - any thoughts/suggestions where I should look first?Cheers,
Gareth
'57 D3 2.7 TDV6 HSE gone and soon to be forgotten!
‘15 D4 3.0 SDV6 HSE Luxury
'64 Audi A6 3.0BiTDi Quattro S-Line Black Edition with lots of toys
3rd Jan 2018 8:41 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13629
hi
may i ask does the arnot compressor req a software update and relay
is the compressors inlet air filter tucked away in the boot nice and clear
have u bubble tested all the joints around the reservoir valve compressor and tank
with the iid have u seen what the compressors pressure readings are plse
3rd Jan 2018 9:47 pm
wizbongre
Member Since: 26 Oct 2013
Location: Liverpool
Posts: 690
Yes, I was still running an original Hitachi model, so used my Nanocom to update the software for the AMK (the Arnot is an AMK in a different bracket.)
I've got a new inlet filter to fit, however the fact the rear goes up and I can see the reservoir build pressure suggests it is something to do with a leak between the compressor and reservoir/front valve.
Bubble tested the central valve block today and will drop the reservoir and test it off the vehicle tomorrow. Its only a few months old though so doubt it has a leak...
The reservoir is getting up to about 1700+ and then drops back to about 300. It then slowly decreases all the way down to about 99 (which may be the lowest reading?)Cheers,
Gareth
'57 D3 2.7 TDV6 HSE gone and soon to be forgotten!
‘15 D4 3.0 SDV6 HSE Luxury
'64 Audi A6 3.0BiTDi Quattro S-Line Black Edition with lots of toys
3rd Jan 2018 11:10 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13629
hi
thks, did it come with a new relay
know the reservoir pipe that attaches to the tank can sometimes rub , so does it drops that quick then or is it overnight ,
if it drops that quick i would have thought u would be able to hear it
so am i right in saying by u still having the message “ raising slowly” the leak may have caused the first compressor to burn out , not fitting a new one it’s got more capacity but indeed if u don’t find the leak will burn the new one out
think to at least check ur reservoir tank would be the first port of call
before removing see if u can hear any leaks around the vehicle , bubble testing everything inc the top of the struts
plse let us know how u get on
don’t know if you’ve seen the pressure sheet , not familiar with the nanocom,
Click image to enlarge
3rd Jan 2018 11:40 pm
G_Cam
Member Since: 12 Aug 2010
Location: Fife
Posts: 2048
Double check the air tank.. they tend to rot on the top .. toward the front and its not easy to spot the leak.
I would suspect that this is the issue OR loom for a melted plastic pneumatic pipe. often caused when the original compressor overheats!
Dessicant powder in the valve blocks might also cause an issue if they are not 100% clean and moving freely.1 TR6 Rusting away quietly
1 FARR UTV SOLD
1 International Harvester SOLD
7 x D3 all SOLD
2 x D4 both SOLD
1 x Mrs D4 'Panther' SOLD
1 x Outlander van SOLD
1 continual stream of car parts and me living in the garage...
3rd Jan 2018 11:50 pm
wizbongre
Member Since: 26 Oct 2013
Location: Liverpool
Posts: 690
The reservoir is currently detached from the car and bubble tested successfully... No leaks. If I manually run the compressor the reservoir gets up to a good 1800psi. As soon as I turn it off it farts and then it drops down to around 350 and then slowly (over a couple of minutes) drops to 99. Suspect this is just the residual reading. When I restart the pressure jumps straight to ~1300 again.
The problem is that the compressor runs permanently, with the reservoir valve open 100%. There are no leaks that I can find around the compressor, reservoir or central valve block.
What next?Cheers,
Gareth
'57 D3 2.7 TDV6 HSE gone and soon to be forgotten!
‘15 D4 3.0 SDV6 HSE Luxury
'64 Audi A6 3.0BiTDi Quattro S-Line Black Edition with lots of toys
4th Jan 2018 1:32 pm
Disco_Mikey
Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20727
It sounds as though you have an air leak between the reservoir and centre valve block, or a faulty valve block
Once the reservoir pressure is up to 1800kPa, it should stay relatively stable there...
That leaves a leaky tank, leaky VOSS connector, leaky pipe or valve block not sealing when closed My D3 Build Thread
Member Since: 26 Oct 2013
Location: Liverpool
Posts: 690
Thanks Mikey. I’m currently stripping the central and front valves blocks off to leak test, remove, clean and refit. Hoping I’ve ducked up a voss Connector somewhere that is causing it!
Should I be looking for anything electrical do you think?Cheers,
Gareth
'57 D3 2.7 TDV6 HSE gone and soon to be forgotten!
‘15 D4 3.0 SDV6 HSE Luxury
'64 Audi A6 3.0BiTDi Quattro S-Line Black Edition with lots of toys
4th Jan 2018 2:06 pm
wizbongre
Member Since: 26 Oct 2013
Location: Liverpool
Posts: 690
At my wits end with this now...
No leaks from the reservoir
No leaks on the pipework between compressor, central valve and reservoir
Central valve has no leaks, is clean and appears to work (by connecting a 12v supply across its terminals you can here/feel it opening and closing) - it’s only a few months old so should be good
Front valve has no leaks and also appears fine - again, it’s only a few months old
I’ve not replaced the rear valve block yet - could that cause these issues?
Could there be a blocked pipe rather than a leak?
I’ve run the compressor with the inlet pipe detached to make sure it isn’t the filter - still the same
Hopefully unrelated, the upper tailgate switch keeps pressing on its own - appears to be wet inside the tailgate handle that has got into the switch wiring.
HELP!!Cheers,
Gareth
'57 D3 2.7 TDV6 HSE gone and soon to be forgotten!
‘15 D4 3.0 SDV6 HSE Luxury
'64 Audi A6 3.0BiTDi Quattro S-Line Black Edition with lots of toys
4th Jan 2018 3:44 pm
wizbongre
Member Since: 26 Oct 2013
Location: Liverpool
Posts: 690
It’s been a long day...
There are no leaks that I can find around the pipework or compressor, the central and front valves all appear ok and I can’t find any leaks on the air struts either.
After stripping virtually the whole system and rebuilding it again (minus the rear valve block) I gave up and had a late lunch. During that time, I grabbed the very latest version of the AMK software and flashed that to the car.
Now, it all seems to work however it still seems to run the compressor more than I’d expect...
It took ages to repressurise the whole system after rebuild but I guess that is to be expected as I’d deflated both the reservoir and all air struts via my Nanocom. Once settled, the reservoir gets up to 1780 and then the compressor shuts off. The pressure reading instantly drops to 350 and the car is level.
Then, the pressure slowly runs down from 350. If I raise the car at this point, the pressure instantly jumps to about 1400 and the car now raises in a normal manner, with no errors or delays - it’s pretty quick. As soon as it hits the right height, the compressor shuts off and the pressure drops back to 350, then again slowly drops down.
I think it might all be sorted, but will take a video of the pressure readings tomorrow to share as it will make more sense than my ramblings above!Cheers,
Gareth
'57 D3 2.7 TDV6 HSE gone and soon to be forgotten!
‘15 D4 3.0 SDV6 HSE Luxury
'64 Audi A6 3.0BiTDi Quattro S-Line Black Edition with lots of toys
4th Jan 2018 9:58 pm
wizbongre
Member Since: 26 Oct 2013
Location: Liverpool
Posts: 690
Another day dawns, with the smell of grease and oil still fresh on me and black still under my nails... The disco is now with my local garage for its MoT. All appeared well this morning and the compressor only ran for a very brief time at start up.
However, the car had to raise slightly both front and rear to standard height, which suggests there is a leak somewhere. For two weeks over the Xmas period it was sat in off-road height with the relay and fuse pulled and didn’t move a millimetre. 11 hours last night in standard and it had dropped a bit all round.
Only thing I can think now is either the rear circuit/valve block has an issue (I have a new block ready to fit) or one/many of the original air shocks are seeping slowly. Although if that were the case, I’d have expected it to drop on that corner when the fuses & relay were plugged. Maybe a suspect height sensor is to blame? Flack and I had a bit of a ‘mare with the “new” sensors I bought and fitted which just wouldn’t calibrate, hence be refitted the old ones. They are about the only original parts of the system now!
This is turning into an epic saga... Cheers,
Gareth
'57 D3 2.7 TDV6 HSE gone and soon to be forgotten!
‘15 D4 3.0 SDV6 HSE Luxury
'64 Audi A6 3.0BiTDi Quattro S-Line Black Edition with lots of toys
5th Jan 2018 10:07 am
wizbongre
Member Since: 26 Oct 2013
Location: Liverpool
Posts: 690
Well, it pretty much sailed through the MoT again and has been faultless all day. Fingers crossed I’ve sorted whatever be issue was...Cheers,
Gareth
'57 D3 2.7 TDV6 HSE gone and soon to be forgotten!
‘15 D4 3.0 SDV6 HSE Luxury
'64 Audi A6 3.0BiTDi Quattro S-Line Black Edition with lots of toys
5th Jan 2018 5:49 pm
G_Cam
Member Since: 12 Aug 2010
Location: Fife
Posts: 2048
Glad you have it sorted 1 TR6 Rusting away quietly
1 FARR UTV SOLD
1 International Harvester SOLD
7 x D3 all SOLD
2 x D4 both SOLD
1 x Mrs D4 'Panther' SOLD
1 x Outlander van SOLD
1 continual stream of car parts and me living in the garage...
It sounds about right now Gareth apart from it dropping. As you state if it was a one of the air bags it drop on that corner, The only valve common to all is the centre valve, but if its ok now and only dropping a small amout then it might be best to live with it.
Flack
6th Jan 2018 8:52 pm
wizbongre
Member Since: 26 Oct 2013
Location: Liverpool
Posts: 690
Yep, thanks all. It raises immediately now and the compressor only runs for short periods of time and doesn't seem to get too hot any more.
Pretty sure there is a height sensor out of whack but that can wait for the weather to warm up a bit as I'm still defrosting after spending most of last week under the thing in freezing cold, rain and wind!Cheers,
Gareth
'57 D3 2.7 TDV6 HSE gone and soon to be forgotten!
‘15 D4 3.0 SDV6 HSE Luxury
'64 Audi A6 3.0BiTDi Quattro S-Line Black Edition with lots of toys
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
