Member Since: 10 Jan 2010
Location: NW Highlands
Posts: 5098
Suspension compressor running - no gallery pressure
My 2005 D3 has an AMK compressor.
The compressor runs for about 5 secs before stopping with fault light lit.
Although the compressor runs there is no change in gallery pressure (same as atmospheric)
All sensors seem to have correct voltage supply and be delivering expected readings.
What do people think the most likely cause?
Can the exhaust valve be manually checked?
- can the IID force the exhaust valve to cycle or is there an easy way to apply power to the valve?
Any sensible way of checking whether the compressor is actually working as well as just running
- I can easily run the compressor manually.
Any suggestions gratefully received, thanks.Black 05 TDV6 HSE Auto
Grey 05 TDV6 HSE Auto (Gone)
54 TDV6 SE Man (killed by me )
4th Nov 2019 6:49 pm
Disco_Mikey
Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20830
Undo the pipe from compressor into valve block, run compressor, check for air output My D3 Build Thread
Member Since: 10 Jan 2010
Location: NW Highlands
Posts: 5098
Makes sense DM!
I've never had good luck with the push/Voss connectors - is one end normally more 'reliable' than the other?
edit:I must be tired - I'll just go and try to pull the pipe from the valve block, like you suggested! Black 05 TDV6 HSE Auto
Grey 05 TDV6 HSE Auto (Gone)
54 TDV6 SE Man (killed by me )
4th Nov 2019 6:54 pm
highlands
Member Since: 10 Jan 2010
Location: NW Highlands
Posts: 5098
On the plus side, when I first got the fault I redid the wiring fixes in the NSF wheel arch with much nicer connectors.Black 05 TDV6 HSE Auto
Grey 05 TDV6 HSE Auto (Gone)
54 TDV6 SE Man (killed by me )
4th Nov 2019 6:57 pm
Disco_Mikey
Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20830
highlands wrote:
Makes sense DM!
I've never had good luck with the push/Voss connectors - is one end normally more 'reliable' than the other?
edit:I must be tired - I'll just go and try to pull the pipe from the valve block, like you suggested!
Member Since: 10 Jan 2010
Location: NW Highlands
Posts: 5098
Have got and fitted a new air compressor and all is good!
I cleaned, dried the silica and put new filters in the old one before replacing it and it was giving more air through the feed pipe.
Before I fitted the new comp though I tried the old one and....
The majority of the air was being fed straight to the exhaust outlet!
So, fitted the new one, but if I can get the exhaust valve working properly I reckon the old one will be fine also.
Anyone have an exploded diagram of how the port/valve should look and possible avenues to go down.
I'll check the solenoid works but even if it didn't I assume it would default to closed anyway.
Is it sprung or does it work on pressure differential?
Thanks!Black 05 TDV6 HSE Auto
Grey 05 TDV6 HSE Auto (Gone)
54 TDV6 SE Man (killed by me )
10th Nov 2019 10:26 pm
highlands
Member Since: 10 Jan 2010
Location: NW Highlands
Posts: 5098
^ Anyone? Black 05 TDV6 HSE Auto
Grey 05 TDV6 HSE Auto (Gone)
54 TDV6 SE Man (killed by me )
14th Nov 2019 7:23 pm
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 5029
Just remove it and clean it, if no joy you might be able to find a replacement
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8219
If the exhaust valve has not been working correctly for some time and as you say it only runs for 5 seconds you have it a fault with the compressor, there are valves inside the compressor.
With the Hitachi compressor they are simple rubber valves which can stick if the car has been stood for a long period(weeks, months) and/or disintegrate, I don’t know about the AMK.It can when others can't,
It will when others won't,
It goes where others don't.
15th Nov 2019 8:31 am
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 14103
Ref the AMK , I came across this and wondered if it may be of any help
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