No tick from the Pressure Regulator

kiwi · Post by **kiwi** » Wed Feb 04, 2009 9:56 am

Further to the mystery of the Red Hydraulic Stop light! Failure of suspension to rise problems thats been experiancing.

I got no ticking!!!

To get the suspension to rise I turn the engine off then on to get a single tick and suspension to rise.

Not sure on this but whats the issue with accumulator spheres and this kind of thing? How you know when one has failed?

Aerodynamica · Post by **Aerodynamica** » Wed Feb 04, 2009 12:23 pm

It should tick rapidly if the accumulator has failed.

Have you tried priming the hydraulic pump with LHM then restarting? If the rubber suction pipe has a split in it the pump can run dry and will not re prime as it'll draw air.

kiwi · Post by **kiwi** » Wed Feb 04, 2009 7:36 pm

There are no visible external leaks the piping throughout the car is dry.

I suggested there was a leak drawing air in before and was told on here not possible without an external leak of some form.

Short of completly removing every componant thats not been replaced I seem to be getting no where with this and all this started after replacing the FDV and Regulator which were leaking.

Aerodynamica · Post by **Aerodynamica** » Wed Feb 04, 2009 9:44 pm

Does the PAS work ok in spite of the other symptoms?

DLM · Post by **DLM** » Thu Feb 05, 2009 6:32 pm

Not sure on this but whats the issue with accumulator spheres and this kind of thing? How you know when one has failed?

If the acc has failed then your reference pressure for pump cut-in won't be there at all - or will be way down. If your suction pipe has a leak - maybe a leak only in a particular set of conditions - then there's nothing to be supplied from the pump in those conditions.

But doesn't the click indicate the end of the PR pressure correction cycle, coming after the hiss?

kiwi · Post by **kiwi** » Fri Feb 06, 2009 11:03 am

Aerodynamica wrote:Does the PAS work ok in spite of the other symptoms?

Seems to work although some noise occasionally present on lock or turning.

Really starting to think maybe when I refurbished the FDV I did something wrongs should have just swaped the balrdy thing instead of being clever and refitting one that was not leaking anyways.

So looking forward to swaping around from the other BX .............Not!!! (he says with sarcasm at his plight)

The trick will be getting it through its bi annual MOT next month! Me thinks bulb failure is appropriate.

DLM, Not sure what you wrote mate

DLM · Post by **DLM** » Fri Feb 06, 2009 12:17 pm

DLM, Not sure what you wrote mate

Sorry if seemed a bit obscure - was more or less thinking out loud - which comes from many years of trying not to jump to a conclusion on BX faults. I don't always succeed.

I think you need to swap the acc(umulator) over from the other car and see if there's any difference. If the other acc is known good then you can test your theory very quickly.

I reckon it's a case of one of the following:

(1) No demand for pressure (e.g. sludged-up height correctors or other components) - acc irrelevant here.
(2) Lack of flow from pump - though really this should keep the PR asking for more pressure and induce tickage.
(3) PR not doing what it should - for whatever reason.

The fact that you can persuade the car to rise on a second startup suggests that

Aerodynamica · Post by **Aerodynamica** » Fri Feb 06, 2009 1:32 pm

I think you're definitely getting flow from the pump if the PAS operates (and that it does go up eventually - missed that in the original post

)

Did you ensure that the pipes of the FDV were all fitted in the right ports? - long shot.

kiwi · Post by **kiwi** » Fri Feb 06, 2009 6:16 pm

Aerodynamica wrote: Did you ensure that the pipes of the FDV were all fitted in the right ports? - long shot.

yep that part I am sure of them being metal and all.

Its damn frustrating I cant get hold of the Hydruncage stuff and even getting a spare supply of LHM is proving difficult at the moment. So cant flush the systems which ideally I want to do before swapping anything else around. Oh do I miss having the resources of the UK at my ease of disposal or should also say miss living near a big town!