P38A EAS again.

Hi All
1996 P38 4.6 HSE.
This all stems from a problem I had a while ago.
https://www.landyzone.co.uk/land-rover/unrepairable-eas-fault-after-side-steps-fitted.390318/

Here is the latest.
Last year I had a problem which meant installing the Schrader valves and manually pumping the suspension up. All was ok for 3-4 months then height dropped evenly all around, so a leak in a part of the system common to all springs. Since then it has just sat and done nothing on the drive.
I removed the Schrader valves and reconnected the lines to the valve block.

New Compressor installed (as the old one was very worn and original).

No EAS fault on dash at first. Then after a while I get the EAS fault message and all 4 height LEDs flash and keep flashing.
EAS unlock talks to the ECU, reading the faults the only one I get it RR signal incorrect, no other messages at all.
The compressor runs.
The front seems to have visually lifted to a normal looking height, the rear is on the bump stops.
Clicking Unlock EAS removes the message, but the lights are still flashing.
Checking the heights under the calibration tab confirms the front has lifted.
The RL seems to think it is high (but it's on the bumpstops).
The RR seems to suggest it is on the bumpstops (which it is).

Somebody replaced the RL for me after I had steps fitted and the RR seems to be the original.

What is my next step to take on getting to the bottom of this?
Thanks in advance.
James

If it dropped with schrader valves fitted, then there is a leak. That problem needs sorting before you can progress.
How old are the air springs? The design life is 8 years 80K miles, put it up to max height with the schrader valves and check if the bags are perished. Is the exhaust OK? Exhaust leaks are likely to melt the air pipes causing a leak.
It also sounds like the RL is either incorrectly fitted or the connector is corroded.

Datatek said:

If it dropped with schrader valves fitted, then there is a leak. That problem needs sorting before you can progress.
How old are the air springs? The design life is 8 years 80K miles, put it up to max height with the schrader valves and check if the bags are perished. Is the exhaust OK? Exhaust leaks are likely to melt the air pipes causing a leak.
It also sounds like the RL is either incorrectly fitted or the connector is corroded.

Click to expand...

The rear springs are Dunlops fitted 8-10 years ago, so on the limit age wise, but only done maybe 20-30K miles in that time. The age probably trumps that.
When the schrader valves were on it it stayed up for 3-4 months with no issues, then very gradually the rear started dropping after that. With that in mind the rear springs need changing. One of the fronts was changed back in October when one went pop, the other is holding air but needs to be changed too so they are all done.

The RR signal incorrect, what is causing that? Almost like it cannot sense a signal. RL was replaced, but I am not sure on the quality of the part (looks new aftermarket) but not particularly well installed. I will get under it again during the week and investigate further.
For now it's on stands holding the body up from the axle (which is on shorter stands).

Thanks

JamesBB said:

The rear springs are Dunlops fitted 8-10 years ago, so on the limit age wise, but only done maybe 20-30K miles in that time. The age probably trumps that.
When the schrader valves were on it it stayed up for 3-4 months with no issues, then very gradually the rear started dropping after that. With that in mind the rear springs need changing. One of the fronts was changed back in October when one went pop, the other is holding air but needs to be changed too so they are all done.

The RR signal incorrect, what is causing that? Almost like it cannot sense a signal. RL was replaced, but I am not sure on the quality of the part (looks new aftermarket) but not particularly well installed. I will get under it again during the week and investigate further.
For now it's on stands holding the body up from the axle (which is on shorter stands).

Thanks

Click to expand...

As I said, the sensor problem could be just the connector or incorrect installation. However there are some Chinese height sensors on the market and they are not good quality, I tried one and the readings were all over the place.
Once the leak is fixed you can progress.

Surely if you put schrader valves on the airlines to the airsprings, then there was no point where there could be a "leak in a part of the system common to all springs". Or did you use t-pieces & retain the valve block connections ?

pwood999 said:

Surely if you put schrader valves on the airlines to the airsprings, then there was no point where there could be a "leak in a part of the system common to all springs". Or did you use t-pieces & retain the valve block connections ?

Click to expand...

No, you are right, it just dropped on the springs that are old, so the entire rear, the front was not so noticeable
I need to swap out the other springs and get a couple of replacement rear height sensors if the cleaning of connectors does not work.