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Thread: Suspension raising times

  1. 22nd April 2024, 09:09 AM #11
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    Quote Originally Posted by BradC View Post
    I know I'm being picky but when you're talking timing this stuff matters.

    Normal -> Access : 6s
    Access -> Normal : 4.5s
    Normal -> Offroad : 4s
    Offroad -> Access : 7.5s
    Access -> Offroad : 22s.

    Access -> Offroad ran out of puff after the rear was at height (9s) and the compressor had to run for 13 seconds to get the front to height.

    Between each test the system was allowed to recharge the reservoir and stop the compressor.

    Now, because I had 7 elements on the iiD (Exhaust Valve, Gallery Pressure, Reservoir Valve, Front Left+Right valves and Rear Left+Right valves) the update time and therefore my timing resolution is indicated on the graphs as 0.5s, but I expect it's closer to +/- 1s.
    Nice work...

    Quiet day at the office?
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  2. 22nd April 2024, 10:12 AM #12
    BradC
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    Quote Originally Posted by Tombie View Post
    Nice work...

    Quiet day at the office?
    I was on a run to pickup takeaway for dinner. Just enabled logging on the iID and went at it. By the time I got back into the driveway all tests were complete and I could come inside and view the logs.
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  3. 30th April 2024, 08:26 PM #13
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    Gallery Pressue

    So I have had 'Normal Height' only come up a few times recently.

    Have just got hold of a Gap tool and checked a few live values.

    The gallery pressure starts dropping as soon as the engine is switched off.

    Is this normal?
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  4. 1st May 2024, 09:13 AM #14
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    Quote Originally Posted by MadJax View Post
    So I have had 'Normal Height' only come up a few times recently.

    Have just got hold of a Gap tool and checked a few live values.

    The gallery pressure starts dropping as soon as the engine is switched off.

    Is this normal?
    No, you have a leak somewhere, known culprits are the airbags themselves, the central and corner valve blocks. Others leak points are the compressor cap or the supply lines to each corner.
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  5. 1st May 2024, 10:32 AM #15
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    Quote Originally Posted by Eric SDV6SE View Post
    No, you have a leak somewhere, known culprits are the airbags themselves, the central and corner valve blocks. Others leak points are the compressor cap or the supply lines to each corner.
    Gallery vents as soon as you switch off so i'd say its normal ?
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  6. 1st May 2024, 12:54 PM #16
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    Apologies, I read it as the car drops as soon as switched off, that'll teach me for reading and responding on a crowded train....
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  7. 1st May 2024, 01:47 PM #17
    BradC
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    Quote Originally Posted by MadJax View Post
    So I have had 'Normal Height' only come up a few times recently.

    Have just got hold of a Gap tool and checked a few live values.

    The gallery pressure starts dropping as soon as the engine is switched off.

    Is this normal?
    No it's not. Provided you have > 2006 compressor software, when running the car will level and once it's level it vents the gallery. When the gallery is idle, it vents to between 2 & 5 bar (mine stops at ~2.6 bar usually). It should not drop from there whether the car is running or not. The fart when you shut it down is the suspension re-leveling once all the people get out of the car. The gallery will still have between 2 & 5 bar (absolute not gauge)

    If you are seeing a steady drop in pressure then you have a leak. Compressor is the most likely culprit, but could also be a hose, fitting or valve block.
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  8. 3rd May 2024, 06:21 PM #18
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    Suspension has been in high for a week without the engine being started. Will rebuild the compressor tomorrow and see what happens
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  9. 3rd May 2024, 10:07 PM #19
    BradC
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    As Eric said, look for cracks between the 2 ports on the dryer cap.
    MY08 D3 - The Antichrist - "Permagrimace". Turn the key and play the "will it get me home again" lottery.
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  10. 4th May 2024, 08:50 AM #20
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    Quote Originally Posted by MadJax View Post
    Suspension has been in high for a week without the engine being started. Will rebuild the compressor tomorrow and see what happens
    Did the car lower at all whilst switched off? If it hasn't, then all is normal. A rebuild is good preventative maintenance. The desicant dust travels and blocks up the valve blocks at each corner.
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