[umitbat]

Hi
Right front dips when engine is off and it even dips more as i ride,as speed rises to 20-30miles.
It nearly levels when highway mode activates.
And nearly levels as engine running at stand still,but dips again 15-20 min after engine off and when i cruise.
Front pillow leak tested;no leak.
Compressor was pumping 9,8 where it should be 11,8;tested with new comp;pumped 11,8 but did the same;dipped at ride.
No error codes all the way.

 

[Dan_UK_1984]

How much would you say it drops by? It will often adjust when the driver gets out after you've shut the door because the suspension has compensated for the weight of the driver. This wouldn't explain dropping at speed so much though....

Have you had any of the height sensors changed or know if they have been? It almost sounds as if the calibration is out and front left and right are fighting each other, but not enough to actually trigger a fault. I would give your local dealer a bell and ask them how much they would charge for an EAS Calibrate (I'd hope for 30 mins, but more than likely they'll charge for an hour, but it may be worth it)

 

[umitbat]

It dips by 1,5-2 cm when engine off.
And more as i ride.
They did calibration twice-no charge-but they lasted 5 min each.
Is it a 30 min process?
They want to install a new suspension and try.
As i read it seems more like sensors.

 

[Dan_UK_1984]

It dips by 1,5-2 cm when engine off.
And more as i ride.
They did calibration twice-no charge-but they lasted 5 min each.
Is it a 30 min process?
They want to install a new suspension and try.
As i read it seems more like sensors.

They did calibration twice-no charge-but they lasted 5 min each. Is it a 30 min process? - I would be very surprised if it is only a 5 minutes job because a base reference needs to be set. With the P38 this involved deflating the system onto chocks between the bump stops so the system knows where the exact height it should be is. Was it an actual LR Dealership you went to or a LR specialist? Whilst the car is running and plugged in, if it adjusts at all they will be able to see why it
has adjusted ie request from OSF sensor etc.

They want to install a new suspension and try. - A what? The whole thing?? I would be wary of this garage, they seem like they just want to replace everything?

I would also ask them to check the function of the cross link valve (connects left to right for greater axle articulation off road), if it's stuck open then when it tries to adjust for driver weight it will screw the other side up, which could cause it to give up trying to raise and just lower the other side, which as the valve is stuck open causes both sides to lower, but the driver more so....

Overall is going to be a difficult one to diagnose over the internet.

Dan

 

[umitbat]

Thanks for infos.
After todays calibration,back is 0,5 cm,front is 1 cm lower at right side.
They lowered the car,then to normal,then measured all sides at calibration

This is a LR specialist not a dealership.

Will crosslink valve cause dip on the move?

 

[Dan_UK_1984]

I would say that they are not callibrating it correctly for a start.... Take it to an actual LR Dealer. They will be more expensive, but will know what they are doing and could save you money in the long run.

Get them to do the free 60 point health check whilst its in there too, it might bring other issues to your attention, I have mine done yearly, makes sense as its free

The crosslink valve will exagerate any problems with the height sensors because the system won't be able to compensate for one wrong sensor (it relies on the other 3 being stationery) I doubt you have a problem with this, but it is a posibility.

Dan

 

[umitbat]

Wouldn't these valves or sensors give error message if they were faulty?
I will calibrate at dealer.

 

[Dan_UK_1984]

Wouldn't these valves or sensors give error message if they were faulty?

In "Theory" yes! But the system will allow a certain amount of tolerance before you get a code, as with leaks, it will allow a small leak and just accommodate it.

 

[jesone430]

mine started doing it today (same side as yours) buts its been freezing.. I heard that the extreme weather messes with the sensors.. I have no codes either...

 

[umitbat]

mine started doing it today (same side as yours) buts its been freezing.. I heard that the extreme weather messes with the sensors.. I have no codes either...

So will yours correct itself when weather is warmer?????
Weather is not an issue with mine yet.

 

[Dan_UK_1984]

mine started doing it today (same side as yours) buts its been freezing.. I heard that the extreme weather messes with the sensors.. I have no codes either...

If there is any moisture in the system then you can get water freezing in the valves, or in the pipes etc. This is bad. The system incorporates an air drier which is meant to be self drying (every time the suspension lowers it blows the moisture back out). Do you have a particularly wet wheel well? Is the interior of the car damp?

 

[umitbat]

Is there a shock absorber also besides the air pillows on the car?
Since smn said shocks may be dead thas why it dips.

 

[darrenmax]

there are shock absorbers but they do nothing to the ride height

 

[umitbat]

OK i was told that they are gas filled and if there is gas leak there,should make that.

 

[Dan_UK_1984]

OK i was told that they are gas filled and if there is gas leak there,should make that.

They are gas, or oil filled.

A shock just absorbs excess movement and adds rigidity to the suspension, without them in would be VERY bouncy; but no higher or lower, it doesnt support the car in any way. They usually have resistance in both directions to stop rebound.

 

[umitbat]

I had another dealer made the calibration today.
Right front dipped again when we rode.
We will try with new sensors next week.
Seems no air leak since we rose right side and waited for 30 min.

 

[umitbat]

This morning all 3 sides are 74(+-1mm);only left front is 74,5cm.