Jerky suspension?

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davetherave
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Jerky suspension?

Post by davetherave »

I have just looked at a hydractive v6 for someone, and replaced a few spheres, but cant understand why when the electovalves kick in the car will jerk up then settle back down, both at front and back.

Does anyone have any ideas? the lexia throws up no suspension faults.
Cheers
Dave
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Dommo
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Post by Dommo »

Is it a sinker car? If not, does it only happen when you put it into service low when you park it up?
davetherave
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Post by davetherave »

Its not a sinker and I think it only does it when switching between low and high and vice versa but have not driven it.
(95) XM Silver 2.1td Exclusive.
(87) Cx 2.5 DTR T1 undergoing major cosmetic surgery.
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Dommo
Posts: 1191
Joined: 11 Apr 2009, 09:43
Location: Stoke-on-Trent
My Cars: Current
07 C5 VTX+ 2.2 HDi 173hp
97 S1 Activa
06 Boxster S
93 XM 2.1 Turbo SD

Previous cars
91 Toyota Soarer UZZ32 Active Suspension
97 S1 VSX 1.9 Turbo D
99 Xantia Activa
98 2.1TD Xantia
99 306
x 19

Post by Dommo »

Well I find my Activa does it when I park up, put the car in service low, and turn the engine off, letting the car sink after I'm out of the car and the doors are locked.

The problem with this is, after 30 seconds the electrovalves turn off, closing off the hydractive circuit, so this circuit stays pressurised, but the rest of the system depressurises. So when you open the door, and the hydractive electrovalves open, the pressure inside the hydractive system makes the car jump slightly.
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CitroJim
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Re: Jerky suspension?

Post by CitroJim »

davetherave wrote:I have just looked at a hydractive v6 for someone, and replaced a few spheres, but cant understand why when the electovalves kick in the car will jerk up then settle back down, both at front and back.

Does anyone have any ideas? the lexia throws up no suspension faults.
Cheers
Dave
Dave, is this when the car is coming down from high setting or on hard/soft switching when at normal ride height?

Is it a MK1 or MK2? The last question is significant...
Jim

Runner, cyclist, time triallist, duathlete, Citroen AX fan and the CCC Citroenian 'From A to Z' Columnist...
davetherave
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Post by davetherave »

Its a mk1, I can remember specifically if it was down to up or vice versa, but just whilst we were fidling and a door was opened etc
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CitroJim
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Post by CitroJim »

davetherave wrote:Its a mk1,
OK, that's good. Its quite normal for a MK1 Hydractive Xantia to show this behaviour when descending from high to low. All mine do and it's nothing to worry about so long as every otheraspect works fine.

No idea why it does it; it just does....
Jim

Runner, cyclist, time triallist, duathlete, Citroen AX fan and the CCC Citroenian 'From A to Z' Columnist...
davetherave
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Joined: 01 Apr 2009, 21:06
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Post by davetherave »

Fair enough thats a relief, im sure the owner will be relieved too!
Cheers Jim!
Dave
(95) XM Silver 2.1td Exclusive.
(87) Cx 2.5 DTR T1 undergoing major cosmetic surgery.
GPZ500s
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