P38A Make your mind up girl?

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Mark Piercy

Mark Piercy

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Anybody any experience with this one?
1999 2.5tdi auto.
I did a suspension relay modification to stop the self leveling after ignition off.
After that it would go to road height on startup regardless of its previous setting.
This morning, it now lowers itself to the access level regardless of its previous setting on startup....
I think there is a coms problem somewhere as occasionally she'll jump to the upper height at low speed, sub 20mph and sometimes behaves as if there is no air in the system.. I know the air block driver has a crack in the resin... So there maybe something in that but it's never effected by humidity... No wet carpets either.
Any experiences anybody?
Thanks.o_O;)
 
Mark Piercy said:
Anybody any experience with this one?
1999 2.5tdi auto.
I did a suspension relay modification to stop the self leveling after ignition off.
After that it would go to road height on startup regardless of its previous setting.
This morning, it now lowers itself to the access level regardless of its previous setting on startup....
I think there is a coms problem somewhere as occasionally she'll jump to the upper height at low speed, sub 20mph and sometimes behaves as if there is no air in the system.. I know the air block driver has a crack in the resin... So there maybe something in that but it's never effected by humidity... No wet carpets either.
Any experiences anybody?
Thanks.o_O;)
Click to expand...
Sounds like you have fecked it. Air block driver? what do you mean?
 
Mark Piercy said:
Anybody any experience with this one?
1999 2.5tdi auto.
I did a suspension relay modification to stop the self leveling after ignition off.
After that it would go to road height on startup regardless of its previous setting.
This morning, it now lowers itself to the access level regardless of its previous setting on startup....
I think there is a coms problem somewhere as occasionally she'll jump to the upper height at low speed, sub 20mph and sometimes behaves as if there is no air in the system.. I know the air block driver has a crack in the resin... So there maybe something in that but it's never effected by humidity... No wet carpets either.
Any experiences anybody?
Thanks.o_O;)
Click to expand...

Why did you do that?
 
Mark Piercy said:
The driver pack or black box? on the side of the air suspension block. :oops:
Click to expand...
Cracks in the Driver Pack resin are not unusual, however if the cracks are at the cable entry end, it's possible that an electrolytic has failed. This can cause random height changes or a hard fault but I'd put the relay back to standard as a starting point.
 
Datatek said:
Cracks in the Driver Pack resin are not unusual, however if the cracks are at the cable entry end, it's possible that an electrolytic has failed. This can cause random height changes or a hard fault but I'd put the relay back to standard as a starting point.
Click to expand...
Unless the inhibit button is pressed, the car should always go to normal height at start up.
 
wammers said:
Why did you do that?
Click to expand...
I had done the interference mod to stop it from self leveling downwards, therefore using air in the tank in the morning to put it back where I left it. The same as locking it into road height or motor way height rather than having it do unnecessary height adjustments simply.
 
Datatek said:
Unless the inhibit button is pressed, the car should always go to normal height at start up.
Click to expand...
It was originally adjusting to road height on startup regardless of the inhibit button on or off!
The crack in the resin on the pack is in the middle of the resin face.
I will swap the relay back and see what happens.
It was the relay on the fuse box and not the one under the seat.. just to be clear guys.
 
Update.
Rewired the relay as standard.
Now it stays where I left it before ignition off??
On start up it doesn't lift upto road height and doesn't drop to access height either... o_O
Where is the WTF emoji??
 
Mark Piercy said:
:mad: this one will do...
Click to expand...
Are we sure about immediate up to normal on engine start up? @Datatek
Both of mine stayed where I had left them at "access" when I parked them and later re-started them.
Just been out to mine and have observed the following sequence.
  1. Ignition on = All EAS "level" lights illuminated.
  2. Engine Start..... EAS shows current position (e.g. where I left it......at "Access").
  3. Put it in anything OTHER than Park with Handbrake on (Stays at Access).
  4. Release Handbrake AND footbrake take out of Park (in my case into Neutral) and only then does it begin to rise to Normal.
At least that's what I have just observed.
 
DanClarke said:
Are we sure about immediate up to normal on engine start up? @Datatek
Both of mine stayed where I had left them at "access" when I parked them and later re-started them.
Just been out to mine and have observed the following sequence.
  1. Ignition on = All EAS "level" lights illuminated.
  2. Engine Start..... EAS shows current position (e.g. where I left it......at "Access").
  3. Put it in anything OTHER than Park with Handbrake on (Stays at Access).
  4. Release Handbrake AND footbrake take out of Park (in my case into Neutral) and only then does it begin to rise to Normal.
At least that's what I have just observed.
Click to expand...
1. correct.
2. Engine start..... should show current level constant, desired level flashing until desired height attained unless you selected access before you switched off. If you selected access before you switched off, it will not rise until you move. constantly selecting access is not a good idea as it will just shag the pump out.
3. If access was not selected when you switched off, then this is because all the air has drained out of the system and it takes time to replace it.
4. as for 3 above.
 
We'll most of the odd behaviour has stopped, apart from the odd self lifting into extended mode...which randomly occurs regardless of the relay modification!!
Guess a little observation will tell.
Thanks for your help.:cool:
 
Mark Piercy said:
We'll most of the odd behaviour has stopped, apart from the odd self lifting into extended mode...which randomly occurs regardless of the relay modification!!
Guess a little observation will tell.
Thanks for your help.:cool:
Click to expand...

I think the self-lifting is a sign of a soft-fault, unless as Wammers suggests you have a leaking valve. The driver pack pins are known to need pinching up and then there's the connectors behind the panel on the passenger side. Or who knows, maybe you have a genuine faulty EAS ECU? Rare but anything is possible.
 
Grrrrrr said:
I think the self-lifting is a sign of a soft-fault, unless as Wammers suggests you have a leaking valve. The driver pack pins are known to need pinching up and then there's the connectors behind the panel on the passenger side. Or who knows, maybe you have a genuine faulty EAS ECU? Rare but anything is possible.
Click to expand...

Datatek said:
Often a sign of a driver pack fault.
Click to expand...
i was thinking of the driver or ECU fault myself.. it works pretty well and as expected apart from the odd senior moment:p
Thanks again.;)
 
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