Early morning PAS issue
- Aerodynamica
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Early morning PAS issue
I have recently been getting rough, notchy steering after drivig off from an overnight start. It seems to be low on assistance and just feels dead. It then seems to slowly come back to life after some many miles..
I know the HP pump is not at its best but this is a new symptom.
I'm certain I have heard of this problem before somewhere but can't recall what the possible cause was.
Anyone shed any light on this?
I know the HP pump is not at its best but this is a new symptom.
I'm certain I have heard of this problem before somewhere but can't recall what the possible cause was.
Anyone shed any light on this?
Graeme M
CX 2400 Pallas LPG
2CV6 dolly (SORNed)
Mk1 Xantia 1.9TD SX
'c'est hydropneumatique'
CX 2400 Pallas LPG
2CV6 dolly (SORNed)
Mk1 Xantia 1.9TD SX
'c'est hydropneumatique'
- jonathan_dyane
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Re: Early morning PAS issue
They all do that squireAerodynamica wrote:I have recently been getting rough, notchy steering after drivig off from an overnight start.
Well maybe not all, but many of them, particularly after a cold night. Although the temptation is to jump into the FDV, the most likely candidate, assuming filters and LHM are clean (which I'm sure they will be knowing your enthusiasm for keeping the hydraulics tip-top) prime suspect is a slightly tired HP pump.
"Boring damned people. All over the earth. Propagating more boring damned people. What a horror show. The earth swarmed with them." -Charles Bukowski
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my car does the same
i have to manover my car out of my yard in the mornings
i find that if i turn the motor off when i go to shut the gate the steering seems to sort itself out
when i restart the car it's ok for the rest of the day
i think that the system needs a bit of time to build up a good head of pressure after lifting the the car which may be the case for the old HP pump
i have to manover my car out of my yard in the mornings
i find that if i turn the motor off when i go to shut the gate the steering seems to sort itself out
when i restart the car it's ok for the rest of the day
i think that the system needs a bit of time to build up a good head of pressure after lifting the the car which may be the case for the old HP pump
Citroen BX
Origami in plastic and steel
^^bx>
Origami in plastic and steel
^^bx>
- Aerodynamica
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Cheers for the replies!
- only thing about that is that the other hydraulic bits are quite 'responsive' and the PAS gets a constant stream from the HP pump whereas the rest gets fed upon demand by the accumulator.i think that the system needs a bit of time to build up a good head of pressure after lifting the the car which may be the case for the old HP pump
O shyte I knew that would be said!! is this as much of a cnut to change as I think?Or pinion valve!
Graeme M
CX 2400 Pallas LPG
2CV6 dolly (SORNed)
Mk1 Xantia 1.9TD SX
'c'est hydropneumatique'
CX 2400 Pallas LPG
2CV6 dolly (SORNed)
Mk1 Xantia 1.9TD SX
'c'est hydropneumatique'
- jonathan_dyane
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We-ell, AFAIU, the issues arises because, of course the steering system of the BX is essentially the same type of conventional PAS as fitted to Pugs. As such, it demands high volume, rather than pressure, the purpose of the FDV being to provide a lower pressure supply which bypasses the accumulator. When the pump becomes tired, the 'Citroen' functions (i.e. brakes and suspension) remain to work fine, as the accumulator is able to maintain a reserve which effectively masks the pumps defficiencies. The PAS however, with it's need for high volumes of hydraulic fluid is less forgiving, and the result is loss of PAS in that rather exciting 'notchy' manner. I know you have just replaced the pump, but I would most certainly be trying another and seeing if symptoms change before resorting to changing the pinion valve. A leak in the supply hose from the reservoir to the pump may cause similar symptoms too...Aerodynamica wrote:Cheers for the replies! - only thing about that is that the other hydraulic bits are quite 'responsive' and the PAS gets a constant stream from the HP pump whereas the rest gets fed upon demand by the accumulator.
"Boring damned people. All over the earth. Propagating more boring damned people. What a horror show. The earth swarmed with them." -Charles Bukowski
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If it's pinion valve then no it's not a big biggy really. 2 unions and 2 M8 capheads (I think!). There's the obligatory PITA flexible coupling (which if you have an original with secured studs) is not that much of a PITA. But if you have a GSF (for example) coupling then you need to change into Mr Tickle and have exceedingly long arms (either that or a wrench monkey or mole grips)
1990 BX 16V Platinum Grey
1990 BX TGD White
1960 Morris Minor Clarondon Grey
1971 Triumph 2000 Auto Valencia Blue
1990 BX TGD White
1960 Morris Minor Clarondon Grey
1971 Triumph 2000 Auto Valencia Blue
- Aerodynamica
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- Aerodynamica
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The fluid was changed as soon as I returned from yours a couple of months ago - it's still clear and the filters (cleaned at the same time) are clear too. The HP pump was weak and the one I got from Tim is only marginally better.
Alistair, that's a good thought - the non-PAS type is I believe, the same pump but never has had to do as much work over all. I'll be on the look out for one (if any exist..)
Just completed a trip to Bradford and back with some Bradford area touring (to a CX man's car graveyard for bits) and the whole day the PAS worked better than it has of late.
Alistair, that's a good thought - the non-PAS type is I believe, the same pump but never has had to do as much work over all. I'll be on the look out for one (if any exist..)
Just completed a trip to Bradford and back with some Bradford area touring (to a CX man's car graveyard for bits) and the whole day the PAS worked better than it has of late.
Graeme M
CX 2400 Pallas LPG
2CV6 dolly (SORNed)
Mk1 Xantia 1.9TD SX
'c'est hydropneumatique'
CX 2400 Pallas LPG
2CV6 dolly (SORNed)
Mk1 Xantia 1.9TD SX
'c'est hydropneumatique'
- docchevron
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Twas a tad warmer today mind!
My TD is the same, in the cold weather the PAS is a tad lumpy for the forst few minutes, and that has a new FDV, PR and pump.
It's fine when the ambiant temp is above about 7Deg C though..
My TD is the same, in the cold weather the PAS is a tad lumpy for the forst few minutes, and that has a new FDV, PR and pump.
It's fine when the ambiant temp is above about 7Deg C though..
Smokes lots, because enough's enough already!
Far too many BX's, a bus, an ambulance a few trucks, not enough time and never enough cash...
Far too many BX's, a bus, an ambulance a few trucks, not enough time and never enough cash...
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- Aerodynamica
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Well it has now developed a new feature - the constant hissing is still there but it has changed! it now (sometimes) hisses unevenly like a sort of staccato. Still goes away if you rev up. I think the pump is only using a couple of its pistons.
new pump needed then.....
new pump needed then.....
Graeme M
CX 2400 Pallas LPG
2CV6 dolly (SORNed)
Mk1 Xantia 1.9TD SX
'c'est hydropneumatique'
CX 2400 Pallas LPG
2CV6 dolly (SORNed)
Mk1 Xantia 1.9TD SX
'c'est hydropneumatique'
- docchevron
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Does the pump rattle if you turn the wheel with the car stopped?
I'd say your right though, new pump...
Cant help there I'm afraid..
I'll keep an eye out though.
I'd say your right though, new pump...
Cant help there I'm afraid..
I'll keep an eye out though.
Smokes lots, because enough's enough already!
Far too many BX's, a bus, an ambulance a few trucks, not enough time and never enough cash...
Far too many BX's, a bus, an ambulance a few trucks, not enough time and never enough cash...