Desending Suspension

[BigDingus]

Hi folks.

Bit of a story to tell.

I got myself an RX300 2004 that needed some work on the suspension.

I ended up changing the suspension ECU, refurbished the height sensors and replacing 3 out of the 4 struts which were all leaking.

All has been good for about a year.......... then........... I find the front is no longer keeping it's height. So investigation starts.

I thought the FL strut was leaking as it would loose height quickly, soon followed by the right one.

Before I ordered a replacement I blocked off the airline to the left strut and monitored the right strut to see if it would loose height.

Unfortunately it did, which leads me to think it can't be the left strut, but must be a valve that lets air out the system or something similar.

Throughout all this the rear never lowers but keeps it's height.

I thought ECU but it looses height when there is no power applied (Ignition off).

Has anyone experienced this or have an idea?

[The-Acre]

2 hours ago, BigDingus said:

Hi folks.

Bit of a story to tell.

I got myself an RX300 2004 that needed some work on the suspension.

I ended up changing the suspension ECU, refurbished the height sensors and replacing 3 out of the 4 struts which were all leaking.

All has been good for about a year.......... then........... I find the front is no longer keeping it's height. So investigation starts.

I thought the FL strut was leaking as it would loose height quickly, soon followed by the right one.

Before I ordered a replacement I blocked off the airline to the left strut and monitored the right strut to see if it would loose height.

Unfortunately it did, which leads me to think it can't be the left strut, but must be a valve that lets air out the system or something similar.

Throughout all this the rear never lowers but keeps it's height.

I thought ECU but it looses height when there is no power applied (Ignition off).

Has anyone experienced this or have an idea?

In one of my previous cars it turned out to be where the air hose clips in to the strut, it would loose height overnight.  Have you tried soapy water to check for leaks?

[BigDingus]

Thanks for the input.

Yes I've tried the connections.

Trouble is it's the TWO front struts the are descending and not just one. This is why I'm looking at something else causing it.

If there is a valve the is released when High to normal or low is selected, but so far I can't find any.

Thanks for the input.

Yes I've tried the connections.

Trouble is it's the TWO front struts the are descending and not just one. This is why I'm looking at something else causing it. Also they were both replaced about a year ago, so can't see them both failing at the same time.

If there is a valve the is released when High to normal or low is selected, but so far I can't find any.