L322 Front Suspension has mind of its own

chu017 · Feb 26, 2023

My 08 322 seems to have a bit of a minfmd of its own on the front suspension.

When pulling away and somtimes on tight turns the front suspension seems to rise to full height for a few seconds then drop back yo normal height, this nay happen at other times but I have not noticed it.

This seems to be resulting in scrubbing the outside edges of the front tyers.

My 1st hunch is somthing sticking in a valve block.
On 2 other occasions in very cold weather when having just started the car the front rose to full height then after a minute or so dropped to normal height, at the time I passed this off as temperature related.

Has anyone had this and or any thoughts / advice?

Datatek · Feb 27, 2023

Needs diagnostics, could even be a height sensor.

chu017 · Feb 27, 2023

anything specific I should be looking for?

Datatek · Feb 27, 2023

chu017 said:
anything specific I should be looking for?

Height sensor readings in live data for starters and any other anomalies. If you are right about a sticky valve, then I suspect nothing will show up.

chu017 · Feb 27, 2023

Datatek said:
Height sensor readings in live data for starters and any other anomalies. If you are right about a sticky valve, then I suspect nothing will show up.

I will record some values when I go out later.

I looked at faults in Gap IID but the only thing vaguely related is below. not sure how this might relate to my symptoms.

marjon · Feb 27, 2023

As above log some data.
Valves and sensors.
That fault could be either the beginning of a leak or a weak compressor. or possibly a blocked valve to the tank.

Need to check but thought the suspension is inactive on acceleration and some cornering conditions.

J

Datatek · Feb 27, 2023

chu017 said:
I will record some values when I go out later.

I looked at faults in Gap IID but the only thing vaguely related is below. not sure how this might relate to my symptoms.

That looks like a weak compressor.

marjon · Feb 27, 2023

Or believe it on not a corner valve stuck open

.

J

chu017 · Feb 27, 2023

Datatek said:
That looks like a weak compressor.

I agree, but a weak compressor would not be causing the issue listed in my 1st post.

I will see what live data from a drive shows me later on.

chu017 · Feb 27, 2023

marjon said:
Or believe it on not a corner valve stuck open.

View attachment 283601

J

That is excellent info Thank you.
where is that table from?
a valve stuck open could result in a rise to full height then unsticks so it drops i supose.
This does seem the be front both sides so 2 corner valves stuck ?

either way that would be front valve block?

marjon · Feb 27, 2023

chu017 said:
That is excellent info Thank you.
where is that table from?
a valve stuck open could result in a rise to full height then unsticks so it drops i supose.
This does seem the be front both sides so 2 corner valves stuck ?

either way that would be front valve block?

That's from my 2011 RR files but the faults line up across the range. I find it easier to navigate than the other manuals covering earlier years.

But plenty available manuals online free, That would cover yours.

There is also a "cross" valve in the front too, not exactly sure how that could affect things though.

If its 2 stuck maybe you have a wiring/corrosion issue to the front block.

See what your live data looks like.

J

chu017 · Feb 28, 2023

I am trying to work out how to export the log from Gap IID to my PC / excell etc.

L322 Front Suspension has mind of its own

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